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A ray of light in air is incident on an air-to-glass boundary at an angle of 30 ° with the normal. If the index of refraction of the glass is 1.65, what is the angle of the refracted ray within the glass with respect to the normal?. 56 ° 46 ° 30 ° 18 °.

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slide1

A ray of light in air is incident on an air-to-glass boundary at an angle of 30° with the normal. If the index of refraction of the glass is 1.65, what is the angle of the refracted ray within the glass with respect to the normal?

  • 56°
  • 46°
  • 30°
  • 18°
slide2

A ray of light in air is incident on an air-to-glass boundary at an angle of 30° with the normal. If the index of refraction of the glass is 1.65, what is the angle of the ray reflected off the glass surface with respect to the normal?

  • 56°
  • 46°
  • 30°
  • 18°
slide3
If carbon tetrachloride has an index of refraction of 1.461, what is the speed of light through this liquid? (c = 3 x 108 m/s)
  • 4.38 x 108 m/s
  • 2.05 x 108 m/s
  • -4.461 x 108 m/s
  • -1.461 x 108 m/s
slide4

If the critical angle for internal reflection inside a certain transparent material is found to be 48°, what is the index of refraction of the material? (Air is outside the material).

  • 1.35
  • 1.48
  • 1.49
  • 0.743
slide5

Helium-neon laser light has a wavelength in air of 632.8 nm. What is the energy of a single photon in the beam? (h = 6.626 x 10-34 J-s and c = 3 x 108 m/s).

  • 3.14 x 10-19 J
  • 5.4 x 10-19 J
  • 7.6 x 10-19 J
  • 1.15 x 10-18 J
slide6

A certain kind of glass has an index of refraction of 1.65 for blue light and an index of refraction of 1.61 for red light. If a beam of white light (containing all colors) is incident at an angle of 30°, what is the angle between the red and blue light inside the glass?

  • 0.22°
  • 0.45°
  • 1.90°
  • 1.81°
slide7
A light beam is incident upon a still water surface. What is the maximum possible value for the angle of refraction? (nwater = 1.333).
  • 76.2°
  • 67.5°
  • 54.4°
  • 48.6°
slide8

A beam of light is incident upon a flat piece of glass (n = 1.50) at an angle of incidence of 30°. Part of the beam is transmitted and part is reflected. What is the angle between the reflected and transmitted rays?

  • 79.5°
  • 90.0°
  • 130.5°
  • 140°
slide9

An optical fiber is made of clear plastic with index of refraction n = 1.50. For what angles with the surface will light remain within the plastic "guide"?

  • Θ < 66.6°
  • Θ < 57.1°
  • Θ < 51.7°
  • Θ < 48.2°
slide10

An underwater scuba diver sees the sun at an apparent angle of 45° from the vertical. How far is the sun above the horizon? (nwater = 1.333)

  • 9.9°
  • 13.8°
  • 19.5°
  • 27.0°
slide11

A small underwater pool light is 1m below the surface of a swimming pool. What is the radius of the circle of light on the surface, from which light emerges from the water? (nwater = 1.333).

  • 0.57 m
  • 0.77 m
  • 1.13 m
  • 1.43 m
if total internal reflection occurs at a glass air surface
If total internal reflection occurs at a glass-air surface,
  • no light is refracted.
  • no light is reflected.
  • light is leaving the air and hitting the glass with an incident angle greater than the critical angle.
  • light is leaving the air and hitting the glass with an incident angle less than the critical angle.
dispersion occurs when
Dispersion occurs when?
  • some materials bend light more than other materials.
  • a material slows down some wavelengths more than others.
  • a material changes some frequencies more than others.
  • light has different speeds in different materials.
slide14
When one shines red light and green light on the same place on a piece of white paper, the spot appears to be?
  • yellow.
  • brown.
  • white.
  • black.
slide15

When light from air hits a smooth piece of glass with the ray perpendicular to the glass surface, the part of the light passing into the glass?

  • will not change its speed.
  • will not change its frequency.
  • will not change its wavelength.
  • will not change its intensity.
slide16
Light in air enters a diamond (n = 2.42) at an angle of incidence of 30°. What is the angle of refraction inside the diamond?
  • 11.9°
  • 20.0°
  • 23.8°
  • 27.6°
one phenomenon that demonstrates the wave nature of light is
One phenomenon that demonstrates the wave nature of light is?
  • photoelectric effects.
  • quantization effects.
  • absorption of light by an electron.
  • interference effects.
a line representing a wavefront for a wave should be drawn
A line representing a wavefront for a wave should be drawn?
  • from the source to the receiver.
  • from one crest to the preceding crest.
  • along one of the crests of the wave.
  • in the direction the wave is moving.
one phenomenon that demonstrates the particle nature of light is
One phenomenon that demonstrates the particle nature of light is?
  • the photoelectric effect.
  • diffraction effects.
  • interference effects.
  • the prediction by Maxwell's electromagnetic theory.
slide20
When light of one wavelength from air hits a smooth piece of glass at an angle, which of the following will not occur?
  • reflection
  • refraction
  • dispersion
  • All of the choices will occur.
slide21

When light from air hits a smooth piece of glass (n = 1.5) with the ray perpendicular to the glass surface, which of the following will occur?

  • reflection and transmission at q2 = 0°
  • refraction at q2 = 41.8°
  • dispersion
  • all of the choices will occur
according to present theories of light in some experiments light seems to be
According to present theories of light, in some experiments light seems to be?
  • composed of particles which can neither be created nor destroyed.
  • a particle whose quantized energy depends on its velocity.
  • a wave which moves from one place to another if there is material to vibrate.
  • none of the choices
the wave particle duality of light means that in the same experiment
The wave-particle duality of light means that, in the same experiment,
  • light will act both like a wave and like a particle.
  • light will act either like a wave or like a particle.
  • light will not act like either a wave or a particle.
  • light always exists as two waves or as two particles.
slide24

When Roemer estimated the speed of light from the eclipses of a moon of Jupiter, he observed that the time between eclipses was increasing when?

  • Earth was moving away from Jupiter.
  • Earth was approaching Jupiter.
  • Earth was closest to Jupiter.
  • Earth was on the other side of the sun from Jupiter.
slide25

An oil film floats on a water surface. The indices of refraction for water and oil, respectively, are 1.333 and 1.466. If a ray of light is incident on the air-to-oil surface at an angle of 37° with the normal, what is the angle of the refracted ray at the oil-to-water surface?

  • 18.1°
  • 24.2°
  • 26.8°
  • 37.0°
slide26

A ray of light is incident on the mid-point of a glass prism surface at an angle of 25° with the normal. For the glass, n = 1.55, and the prism apex angle is 30°. What is the angle of incidence at the glass-to-air surface on the side opposite where the ray entered the prism?

  • 14.2°
  • 22.1°
  • 28.2°
  • 46.0°
slide27

A ray of light is incident on the mid-point of a glass prism surface at an angle of 25° with the normal. For the glass, n = 1.55, and the prism apex angle is 30°. What is the angle of refraction as the ray enters the air on the far side of the prism?

  • 14.1°
  • 22.3°
  • 28.4°
  • 46.0°
slide28

An oil film floats on a water surface. The indices of refraction for water and oil, respectively, are 1.333 and 1.466. If a ray of light is incident on the air-to-oil surface at an angle of 37° with the normal, what is the incident angle at the oil-to-water surface?

  • 18.1°
  • 24.2°
  • 27.3°
  • 37.0°
slide29

A light ray passes from air through a thin plastic slab (n = 1.3) with parallel sides. If the incident ray in air makes an angle of 45° with the normal, what is the angle of refraction for the final ray as it emerges from the opposite side of the plastic into the air?

  • 33°
  • 45°
  • 67°
  • 58.5°
slide30

In an experiment to measure the speed of light using the notched-wheel apparatus, the distance between wheel and mirror is 24 km and the wheel has a total of 1000 evenly spaced notches. What minimum rotational speed must the wheel have to allow the reflected pulse to pass through an open notch on the opposite side of the wheel from where the pulse originated? (c = 3.00 x 108 m/s)

  • 0.52 rev/s
  • 3.1 rev/s
  • 6.3 rev/s
  • 12.5 rev/s
slide31

A fish is 1.2 m beneath the surface of a still pond of water. At what angle must the fish look toward the surface (measured with respect to the normal to the surface) in order to see a fisherman sitting on a distant bank? (for water, n = 1.333)

  • 18.6°
  • 37.2°
  • 48.6°
  • Fish will not see fisherman at any angle.
slide32

A ray of light is incident on a liquid-to-glass interface at an angle of 35°. Indices of refraction for the liquid and glass are, respectively, 1.63 and 1.52. What is the angle of refraction for the ray moving through the glass?

  • 23°
  • 30°
  • 38°
  • 46°
slide33

A ray of white light, incident upon a glass prism, is dispersed into its various color components. Which one of the following colors experiences the greatest angle of deviation?

  • orange
  • violet
  • red
  • green
slide34

A ray of light travels across a liquid-to-glass interface. If the indices of refraction for the liquid and glass are, respectively, 1.75 and 1.52, what is the critical angle at this interface?

  • 30.0°
  • 52.2°
  • 60.3°
  • Critical angle does not exist.
slide35

A ray of light travels from a glass-to-liquid interface at an angle of 35°. Indices of refraction for the glass and liquid are, respectively, 1.52 and 1.63. What is the angle of refraction for the ray moving through the liquid?

  • 23.2°
  • 32.3°
  • 38.4°
  • 46.0°
slide36
A fiber optic cable (n = 1.50) is submerged in water (n = 1.33). What is the critical angle for light to stay inside the cable?
  • 83.1°
  • 62.4°
  • 41.8°
  • 27.6°
slide37

If light from a 560 nm monochromatic source in air is incident upon the surface of fused quartz (n = 1.56) at an angle of 60°, what is the wavelength of the ray refracted within the quartz?

  • 192 nm
  • 359 nm
  • 560 nm
  • 874 nm
slide38
What is the angle of incidence on an air-to-glass boundary if the angle of refraction in the glass (n = 1.52) is 25°?
  • 16°
  • 25°
  • 40°
  • 43°
slide39

A monochromatic light source emits a wavelength of 490 nm in air. When passing through a liquid, the wavelength reduces to 429 nm. What is the liquid's index of refraction?

  • 1.26
  • 1.49
  • 1.14
  • 1.33
slide40

Fused quartz has an index of refraction of 1.56 for light from a 560 nm source. What is the speed of light for this wavelength within the quartz? (c = 3.00 x 108 m/s)

  • 1.56 x 108 m/s
  • 1.92 x 108 m/s
  • 2.19 x 108 m/s
  • 4.68 x 108 m/s
slide41

If the wavelength of a monochromatic source is 490 nm in vacuum, what is the wavelength from the same source when it passes through a liquid where the velocity of light is 2.4 x 108 m/s? (c = 3 x 108 m/s)

  • 671 nm
  • 612.5 nm
  • 490 nm
  • 392 nm
slide42

Light from a 560 nm monochromatic source is incident upon the surface of fused quartz (n = 1.56) at an angle of 60°. What is the angle of reflection from the surface?

  • 15°
  • 34°
  • 60°
  • 75°
slide43

According to Planck's formula, tripling the frequency of the radiation from a monochromatic source will change the energy content of the individually radiated photons by what factor?

  • 0.33
  • 1.0
  • 1.73
  • 3.0
slide44

Which one of the following scientists made a successful estimate of the speed of light by taking into account the interval of time delay for one of Jupiter's moons?

  • Galileo
  • Roemer
  • Fizeau
  • Snell
slide45
Which one of the following scientists first measured the speed of light using a rotating toothed wheel technique?
  • Galileo
  • Roemer
  • Fizeau
  • Snell
slide46

If the velocity of light through an unknown liquid is measured at 2.4 x 108 m/s, what is the index of refraction of this liquid? (c = 3 x 108 m/s)

  • 1.8
  • 1.25
  • 1.33
  • 0.80
slide47
Monochromatic light hits a piece of glass. What happens to the wavelength in the glass as the index of refraction increases?
  • decreases
  • increases
  • remains constant
  • approaches 3 x 108 m
slide48
Which of the following describes what will happen to a light ray incident on an air-to-glass boundary?
  • total reflection
  • total transmission
  • partial reflection, partial transmission
  • partial reflection, total transmission
slide49
Which of the following describes what will happen to a light ray incident on an air-to-glass boundary at less than the critical angle?
  • total reflection
  • total transmission
  • partial reflection, partial transmission
  • partial reflection, total transmission
slide50
Which of the following describes what will happen to a light ray incident on a glass-to-air boundary at greater than the critical angle?
  • total reflection
  • total transmission
  • partial reflection, partial transmission
  • partial reflection, total transmission
slide51
As a monochromatic light ray is transmitted through an air-to-glass boundary, what happens to the wavelength?
  • increases
  • decreases
  • remains unchanged
  • approaches zero value
slide52
A light ray in air enters and passes through a block of glass. What can be stated with regard to its speed after it emerges from the block?
  • speed is less than when in glass
  • speed is less than before it entered glass
  • speed is same as that in glass
  • speed is same as that before it entered glass
slide53

A beam of light in air is incident on the surface of a rectangular block of clear plastic (n = 1.49). If the velocity of the beam before it enters the plastic is 3 x 108 m/s, what is its velocity after emerging from the block?

  • 3.00 x 108 m/s
  • 1.93 x 108 m/s
  • 2.01 x 108 m/s
  • 1.35 x 108 m/s
slide54

As the angle of incidence is increased for a ray incident on a reflecting surface, the angle between the incident and reflected rays ultimately approaches what value?

  • zero
  • 45°
  • 90°
  • 180°
slide55
Huygen's wave theory requires which of the following with regard to the relative speeds of light in glass and in air?
  • speed in air is greater than in glass
  • speed in air is less than in glass
  • speed in air equals that in glass
  • speed in glass equals square root of that in air
slide56

A beam of light in air is incident at an angle of 35° to the surface of a rectangular block of clear plastic (n = 1.49). The light beam first passes through the block and re-emerges from the opposite side into air at what angle to the normal to that surface?

  • 42°
  • 23°
  • 35°
  • 59°
slide57

Carbon tetrachloride (n = 1.46) is poured into a container made of crown glass (n = 1.52). If the light ray in glass incident on the glass-to-liquid boundary makes an angle of 30° with the normal, what is the angle of the corresponding refracted ray with respect to the normal?

  • 55.5°
  • 29.4°
  • 31.4°
  • 19.2°
slide58

A monochromatic beam of light in air has a wavelength of 589 nm in air. It passes through glass (n = 1.52) and then through carbon disulfide (n = 1.63). What is its wavelength in the carbon disulfide?

  • 361 nm
  • 387.5 nm
  • 895 nm
  • 960 nm
slide59

A light ray in air is incident on an air to glass boundary at an angle of 45° and is refracted in the glass of 30° with the normal. What is the index of refraction of the glass?

  • 2.13
  • 1.74
  • 1.23
  • 1.41
slide60

Carbon disulfide (n = 1.63) is poured into a container made of crown glass (n = 1.52). What is the critical angle for internal reflection of a ray in the liquid when it is incident on the liquid-to-glass surface?

  • 89°
  • 69°
  • 21°
  • 4.0°