Light And Sound Flashcards

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1
Q

What are light waves

A

Transverse waves that can be reflected and refracted

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2
Q

What happens when a light ray is refracted

A
  1. Refracted towards the normal
  2. Slow down
  3. Speeds up away from normal on exit
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3
Q

What is the equation for the refractive index

A

Speed of light in air ÷ speed in substance

Or n =sin I ÷ sin r

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4
Q

How do you calculate the critical angle?

A

Sin c = 1 ÷ n

This in,y works for light going from slower to faster mediums

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5
Q

What are sound waves?

A

Longitudinal waves that can be reflected

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6
Q

Design an experiment to measure the speed of sound

A
  1. Mic and oscilloscope 50m from a wall
  2. Make a loud noise
  3. Take a time reading and divide in half
  4. use this half time to calculate the speed of sound
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