_____ light is a source of light that is generated by sendingelectric currents from electrodes through a gas.

	LED
	Incandescent
	Fluorescent

2.

Select all that apply. The wave model theory of light is supported by _____.

	the Doppler effect
	refraction and reflection
	the photoelectric effect

3.

Select the best answer. _____ light is a source of light that is generated by heating a piece of tungsten metal until it glows.

	Fluorescent
	LED
	Incandescent

4.

Select the best answer. _____ light is a source of light that is generated by excited electrons emitting photons in a semiconductor material.

	Incandescent
	Fluorescent
	LED

5.

Select all that apply. Red, green, and blue are the _____.

	secondary colors of light
	secondary colors of pigment
	primary colors of light

6.

Select whether the following mirror is a plane, convex, or concave. Some descriptions have more than one answer. curves inward

	plane
	convex
	concave

7.

Select all that apply.

Which of these statements is true about photons?

	One photon can excite one electron.
	One photon can excite several electrons.
	Photons carry a small amount of energy.
	Photons are nearly massless.

8.

Select whether the following mirror is a plane, convex, or concave. Some descriptions have more than one answer. makes images that are the same size as their objects

	convex
	plane
	concave

9.

Select the best answer. _____ are cells in the retina that help to distinguish between colors.

	Cones
	Rods
	Iris
	Photons

10.

Select the best answer. _____ are cells in the retina that are sensitive to dim light.

	Iris
	Cones
	Photons
	Rods

11.

Select the best answer. White is produced when all the _____ primary colors are mixed in equal amounts.

	light
	pigment

12.

Select the best answer. The _____ is the scientific theory that light should be thought of as a particle in addition to a wave.

	electromagnetic theory
	photoelectric theory
	Doppler effect
	wave-particle theory

13.

Select the best answer. _____images are formed when all of the light rays converge to form an image.

	Virtual
	Real
	Inverse

14.

Select whether the following mirror is a plane, convex, or concave. Some descriptions have more than one answer. has a flat, smooth, and reflective surface

	concave
	convex
	plane

15.

Select all that apply. Yellow, magenta, and cyan are the _____.

	primary colors of light
	primary colors of pigment
	secondary colors of light

16.

Select the best answer. The _____ is a phenomenon that occurs when electrons are ejected from a piece of metal after light has been shined onto themetal surface.

	photoelectric effect
	electromagnetic wave
	wave-particle theory
	Doppler effect

17.

Select all that apply. The particle theory of light is supported by _____.

	refraction and reflection
	the photoelectric effect
	the Doppler effect

18.

Select whether the following mirror is a plane, convex, or concave. Some descriptions have more than one answer. curves outward

	convex
	plane
	concave

19.

Select the best answer. The basic particle of light is the _____.

	photon
	positron
	proton
	electron

20.

Select the best answer. Flint glass has an index of refraction of 1.5, and cinnabar has an index ofrefraction of 3.0. In which material will light move slower?

	flint glass
	cinnabar

21.

Select whether the following mirror is a plane, convex, or concave. Some descriptions have more than one answer. produces virtual images

	plane
	concave
	convex

22.

Select whether the following mirror is a plane, convex, or concave. Some descriptions have more than one answer. reverses images left to right

	convex
	plane
	concave

23.

Select whether the following mirror is a plane, convex, or concave. Some descriptions have more than one answer. produces real images

	convex
	plane
	concave

24.

Select whether the following mirror is a plane, convex, or concave. Some descriptions have more than one answer. makes images that are smaller than their objects

	concave
	convex
	plane

25.

Select the best answer. _____ images are produced from reflected light that is perceived by the brain as coming from a real object, even though the object is not real.

	Real
	Inverse
	Virtual