Refraction passage

What is the phenomenon called when light rays bend as they cross from one material to another?

• Refraction

• Reflection

• Diffraction

• Dispersion

Explain why a fish in a stream appears to be in a different place than it actually is when viewed from the shore.

The index of refraction for a material is the ratio of the speed of light in a vacuum to the speed of light in the ___.

Calculate the speed of light in glass using the index of refraction and the speed of light in a vacuum (3 × 10^8 m/sec).

When light travels through a material, it is absorbed and re-emitted by each atom or molecule it hits. This process causes the light ray’s speed to ___.

• Decrease

• Increase

• Remain constant

• Double

Could the index of refraction for a material ever be less than 1.0? Explain.

When a light ray moves from water into air, does it slow down or speed up?

• Speed up

• Slow down

• Remain the same

• Stop