Light And Sound

Question 1

What are light waves

Answer 1

Transverse waves that can be reflected and refracted

Question 2

What happens when a light ray is refracted

Answer 2

1. Refracted towards the normal
2. Slow down
3. Speeds up away from normal on exit

Question 3

What is the equation for the refractive index

Answer 3

Speed of light in air ÷ speed in substance

Or n =sin I ÷ sin r

Question 4

How do you calculate the critical angle?

Answer 4

Sin c = 1 ÷ n

This in,y works for light going from slower to faster mediums

Question 5

What are sound waves?

Answer 5

Longitudinal waves that can be reflected

Question 6

Design an experiment to measure the speed of sound

Answer 6

1. Mic and oscilloscope 50m from a wall
2. Make a loud noise
3. Take a time reading and divide in half
4. use this half time to calculate the speed of sound