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# Light

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by

## Paul Sheffield

on 19 June 2018

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#### Transcript of Light

Starter
Answer the exam question
Remember the angle of incidence = the angle of reflection
Light
L.O
Reflection: Solving problems
Refraction: An introduction
Recap
What is the law of reflection
Decribe an image in a mirror.

Refraction
Explanation of how a wave is affected when it slows down or speeds up
Practical
carry out the practical.
measure the angles.
draw an accurate ray diagram in your book.
What is happening?
Refraction
Density
slowing down
at an angle
medium
speeds up
Normal
towards
away
Syllabus
Waves can be reflected, refracted and diffracted.
Waves undergo a change of direction when they are refracted at an interface.
Reflection
write down two things you understand
write down one thing you are unsure of
grade yourself
Extension
1)
on a ray diagram
prove using the law of reflection where an image appears to be in a mirror
2)
why does lettering appear backwards in a mirror?
What happens to light when it passes from a more into a less dense medium and vice versa
Explain why Archer fish are so cool
In your own words write a paragraph describing what happens to a light ray as it passes through a glass block. use the key words
Waves are not refracted if travelling along the normal.
Snell’s law and the reason why waves are refracted are not required.
Full transcript