When a torch is under water why do some waves get reflected back?
As the angle of incidence is greater than the critical angle.
1 of 6
What condition is necessary for total internal refraction?
The index of refraction must decrease across the boundary in the direction of light refraction and the angle of incidence of the light ray must exceed the critical angle of the interface.
2 of 6
What factors affect diffraction?
Wavelength and gap size.
3 of 6
What are two similarities between electromagnetic waves?
They are all transverse and do not need matter to travel through.
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Why are some objects opaque?
As they do not allow light to travel through.
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Why does a blue object appear blue in white light?
As it absorbs all colours of light other than blue which it reflects.
6 of 6
Other cards in this set
Card 2
Front
What condition is necessary for total internal refraction?
Back
The index of refraction must decrease across the boundary in the direction of light refraction and the angle of incidence of the light ray must exceed the critical angle of the interface.
Card 3
Front
What factors affect diffraction?
Back
Card 4
Front
What are two similarities between electromagnetic waves?
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