PROPERTIES OF LIGHT

As light shines from air to another medium, i = 30.0o, the light bends toward the normal and refracts at 22.0o. What is the index of refraction? n = _____ 0.751 0.0262 1.33 38.2

1.33

If the speed of light in air is 3.00 · 108 m/s (approximately equal to that in a vacuum) and the speed of light in water is 2.25 · 108 m/s, what is the index of refraction of water?

1.33

If the index of refraction of glass is 1.8 and the speed of light in air is 3.00 · 108 m/s, what is the speed of light in that glass? (Round answer to nearest hundredth.) ___ m/s

1.67 x 10^8

As light shines from air to water (n = 1.33) at an incident angle of 45.0°, what is its angle of refraction? r = _____° 1.60 32.1 0.500 148

32.1

Splitting of white light into its component colors is called diffusion. True False

False

Each color has its own frequency and wavelength. True False

True

The index of refraction of light varies from color to color. True False

True

The sky is blue because of scattering. True False

True

The speed of light is approximately 3 · 108 m/s. True False

True

Violet is at one end of the visible light spectrum. True False

True

Wavelength and frequency are inversely proportional. True False

True

When white light passes through a prism, red light is least changed in direction. True False

True

Match the following vocabulary words. Match the items in the left column to the items in the right column. 1.the ratio of the speed of light in a vacuum to its speed in some medium 2.the total reflection of light from a high index of refraction to low index of refraction 3.the angle formed by an incident ray and the normal 4.the image produced as light travels from cool air through warm air and is bent 5.a line perpendicular to a surface 6.the image produced as light travels from warm air through cool air and is bent

normal looming index of refraction total internal reflection mirage angle of incidence