Sound and Light Chapter 17. Lesson 1: What is Sound? Lesson 2: What is Light?. Lesson One Vocabulary. Vibration- a back-n-forth movement of matter Volume- the loudness of a sound Pitch- how high or low a sound is Frequency- the number of vibrations per second. Lesson 1: Sound.
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
Lesson 1: What is Sound?
Lesson 2: What is Light?
Some sounds are high while other sounds are low.
A sound’s pitch is how high or low the sound is.
The number of vibrations in a second is the frequency of a sound.
Frequency and pitch are related.
A sound with high frequency has a high pitch and a low pitch has a low frequency.Lesson 1: Sound
hard surface bounces
back and it called an
echoes in caves
but the particles stay in the
we can see is called
the spectrum have different
In most cases, light spreads out when it is reflected.
But a smooth surface does not spread out and this is why you can see yourself in a mirror.Lesson 2: Light
Opaque materials do not let any light pass through them.
You cannot see through opaque objects.
Most objects around you are opaque, like you shoes, your desk, and a book.Lesson 2: Light
Translucent materials only let some light pass through.
Stain glass windows are translucent.
The difference between transparent and translucent is how they spread out light.
Translucent materials spread more light.Lesson 2: Light
This bending is called refraction.
Refraction changes the angle at which you see things.
Have you ever looked at a straw in a glass of water?
It seems to bend where the straw enters the water. This is refraction.Lesson 2: Light
It bends light waves to bring them together.
A convex lens makes images bigger.Lesson 2: Light