Fundamentals of Light

Light energy is also called

• frequency

• electromagnetic spectrum

• wavelength

• radiation

What is a straight line that represents the path of light?

• ray

• beam

• wavelength

• crest

What is a group of parallel rays?

• wavelength

• beam

• electromagnetic spectrum

• sunlight

What is the number of waves passing a given point every second?

• frequency

• wavelength

• sunlight

• ray

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What characteristic of light is based on the fact that light waves do not need matter to transmit energy?

• Light spreads in all directions

• Light can travel through a vacuum.

• Light travels in straight lines from its source.

• Light travels faster than anything else in the universe.

What makes laser light different from light from a common bulb

• Laser light is more powerful and precise.

• Laser light is used in toys as well as tools.

• Laser light is used in factories and metal shops.

• Laser light transmits energy perpendicular to its forward motion.

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What waves are transmitted by a television remote control device?

• radio waves

• infrared waves

• X-ray waves

• microwaves

In what part of the electromagnetic spectrum do the colors of the rainbow appear?

• visible light

• radio waves

• infrared waves

• ultraviolet waves

What instrument can be found in cameras, DVD players, and photocopiers?

• a lens

• a laser

• a prism

• a mirror

In which case would you be unable to see a reflection?

• The reflecting surface is rough.

• The object being reflected has no color.

• The reflecting surface is a liquid instead of a solid.

• The light rays bounce off the reflecting surface in a single direction.

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