The diagram shows a ray of light in glass incident on the surface between the glass and air.
What happens if the angle of incidence is made larger than the critical angle for the glass?
1 )
The angle of refraction becomes equal to 90°.
2 )
There is a refracted ray and a ray reflected inside the glass.
3 )
There is a refracted ray only.
There is only a ray reflected inside the glass.
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