Image characteristics & laws of reflection

1. Image characteristics& laws of reflection

2. REMEMBER SILT (SALT)

3. REMEMBER SALT (OR SILT) • We use 4 main characteristics to describe an image. • Size of an image compared to the object (Ex. Same Size, Smaller, Larger)

4. SILT/SALT 2. Inversion of Image Attitude of Image – which way the image is oriented compared to the object: Upright or Inverted (Upside down) • Lateral Inversions (left & right) • Vertical Inversion (up & down)

5. 3. Location of Image Where is the image relative to the object or to the mirror?

6. 4. Type of Image (Real or Virtual) – Real being an image formed when light is actually arriving at the image location (Think of movie projectors). Virtual being something that looks beyond the mirror (Think of when you see your reflection).

8. RE-VISIT THE PLANE MIRROR

9. IMAGE CHARACTERISTICS IN A PLANE MIRROR

10. NAMES TO REMEMBER • The following nomenclature is important for you to remember

11. NORMAL • The “Normal” is an imaginary line that is perpendicular to the mirror in all directions.

12. INCIDENT RAY • The “Incident Ray” (Incoming Ray) is the ray which meets the mirror at the “Point of Incidence”.

13. REFLECTED RAY • The “Reflected Ray” is the ray which reflects off the mirror at the “Point of Incidence”.

14. ANGLE OF INCIDENCE • The “Angle of Incidence” (i) is the angle between the Incident Ray and the Normal.

15. ANGLE OF REFLECTION • The “Angle of Reflection” (r) is the angle between the Reflected Ray and the Normal.

16. LAWS OF REFLECTION • The Angle of Incidence (i) is equal to the Angle of Reflection (r). In other words, i = r • The Incident Ray, the Reflected Ray, and the Normal are CO-PLANAR (sit in the same plane).

17. 2nd LAW OF REFLECTION

18. ELECTROMAGNETIC SPRECTRUM • The Laws of Reflection also apply to parts of the Electromagnetic Spectrum that you can’t see. • Ex. If you can see the TV in the mirrors, you can use the remote to operate the TV. Remotes work with Infrared Radiation.