Light and Matter

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What is light?

Back

Light is a form of energy that travels in waves and can be seen by the human eye.

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What is reflection?

Back

Reflection is the bouncing back of light waves when they hit a surface.

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What is refraction?

Back

Refraction is the bending of light waves as they pass from one medium to another, changing speed.

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What is absorption?

Back

Absorption is when light waves are taken in by a material and converted to other forms of energy.

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What is transmission?

Back

Transmission is the passing of light through a material without being absorbed.

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What is an opaque object?

Back

An opaque object does not allow light to pass through it.

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What is a transparent object?

Back

A transparent object allows light to pass through it, making objects behind it visible.

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What is a translucent object?

Back

A translucent object allows some light to pass through but scatters it, making objects behind it unclear.

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What is an echo?

Back

An echo is a sound that is reflected off a surface and heard again.

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NGSS.MS-PS4-2

Front

What is the speed of light?

Back

The speed of light in a vacuum is approximately 299,792 kilometers per second.