refraction Flashcards

1
Q

State what happens to the speed of the wave when it passes through a substance with a higher refractive index.

A

decreases

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2
Q

State what happens to the frequency of the wave when it passes from a low refractive index to a high refractive index.

A

stays constant

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3
Q

How should the normal be drawn?

A

perpendicular to the boundary

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4
Q

State what happens to the wave when it moves from a substance of lower IR to higher IR.

A
  • moves towards the normal
  • moves slower
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5
Q

State what happens to the wave when it moves from a substance of higher IR to lower IR.

A
  • moves away from the normal
  • moves faster
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6
Q

What is refraction?

A
  • when a wave changes direction
  • as it crosses the boundary between two substances
  • with different indices
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7
Q

State how the refractive index vary for the colours of light. What does this mean?

A
  • increases from red to violet
  • violet rays will bend/refract more than red rays
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