The table shows the speed of light in three states of matter. Material Speed (meters/second)
air
300,000,000
water
220,000,000
glass
200,000,000
At what point in time would the speed of light decrease?
A
when the light travels from water to air
B
when the light travels from air to water
с
when the light travels fronwglass to air
D
when the light travels from glass to water

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

Which expression allows you to determine the mechanical advantage of an inclined plane? a. height of plane / input force b. length of plane / input force c. length of plane / height of plane d. height of plane / length of plane

Contains chemical energy. a. heat b. light c. natural gas