In free space, electromagnetic waves travel at a

Radio waves travel

If the sun were to disappear, we wouldn't know it for roughly

Which of the following is fundamentally different from the others?

Which electromagnetic wave has the shortest wavelength?

Which electromagnetic wave has the longest wavelength (lowest frequency)?

A major difference between a radio wave and a light wave is

If the color spectrum ranges from red to violet, then it ranges from

A main difference between radio and sound waves is

Sunburns are produced by

Kids in elementary school get this right: Which color of light gets through red glass?

THe fact you can see stars in the night sky is evidence that

Which of the following cannot travel in a vacuum?

If an electron vibrates up and down 1000 times each second, it generates an electromagnetic wave with a

Compared to the average speed in air, the average speed of light in glass is

Materials generally become warmer when light is

A total shadow is called

A solar eclipse occurs when

A total solar eclipse occurs for people in the Sun's

Information carrying nerves in the eye join the optic nerve from the retina at the

To say that an apple is red means that

What characteristic of light waves relates to color?

The color of an opaque object is the same as the light that is

You can get sunburn while in the shade of a beach umbrella due to

A blueberry will appear black when illuminated with

A red apple will appear black when illuminated with

If sunlight were green instead of white, the most comfortable color to wear on a hot day would be

If sunlight were green instead of white, the most comfortable color to wear on a cold day would be

What color of light is transmitted by blue glass?

A piece of red glass

Light shines on a pane of green glass and a pane of clear glass. The temperature will be higher in the

The LEDs that make up the color on some TV screens are

If three primary colors of light shine on a white wall and produce a white spot, the primaries must be

Which is not a color?

When red, green, and blue light shine on a golf ball, the shadows cast are

The brightest color in sunlight is

The sun is not seen as yellow-green because

If you stare at a red wall for a few minutes and then look at a white wall, you see _______ colors due to retinal fatigue.

Complementary colors are two colors that

How many colors of ink are used to print full-color pictures?

Look at a full color photo with a magnifying glass and you will see inks of

Magenta light is a mixture of

Light is reflected when

When light reflects off a surface, there is a change in

Ninety-five percent of light incident on a mirror is reflected. How much light is reflected off of a series of three mirrors?

Ninety percent of light passes through a given pane of glass. How much light can pass through two successive panes of this glass?

Refraction occurs when light passing from one medium to another

Light refracts when traveling from air into glass because of a change in

When light passes through a standard window, its angle of emergence is

A mirage is a result of atmospheric

In which material does light travel fastest?

If the speed of light through a sphere is 0.67c, its index of refraction is

When spearing a fish with a regular spear, throw your spear __________________ to compensate for the refraction.

The index of refraction for corrective eyeglass lenses is 1.52. The index of refraction in a plastic lens is 1.76. Light bends more in the

A person in waist-deep water appears to have shorter legs because of light

A mirage occurs on road surfaces that are

The type of lens that spreads light out is

The type of lens that brings light to a focal point is

A "burning glass" that concentrates sunlight in one spot is a

In a converging lens, objects infinitely far away are focused

The image of the "infinitely-far-away" sun produced by a converging lens appears

Light travels slower in a lens having a

Diffraction is most closely related to

Diffraction occurs when a wave passes

Which option can exist in the exact same place at the exact same time?

A dolphin perceives greater detail by emitting sounds of

When viewing small objects through a microscope, diffraction is

The device that spreads light into its component colors is a

Polarization is a property of

Which is a property of light waves but NOT of sound waves?

Some double pane airplane windows darken when one pane is rotated. The panes are

Light emitted by the sun is

A pair of polaroid filters interact at a 45 degree angle to each other.

An ideal polaroid filter is translucent and allows 50% of light to pass through it. How much light will pass through two ideal polaroid filters in a parallel orientation?