1)A light ray is incident on a reflecting surface. If the lightray makes a 25? angle with respect to the normal to the surface,what is the exact angle (in degrees) made by the reflected rayrelative to the normal?

2)The light ray that makes the angle ?1' is the refracted ray(true or false?)

3)True or False: The Law of Reflection can be used to show howan image appears behind a mirror and it can also be used todetermine where the image will be located.

4) Snell's law is another namefor the

law of dispersion

law of reflection

law of refraction

5) A light ray incident on a block of glass makes an incidentangle of 50.0? with the normal to the surface. The refractedray in the block makes an 26.8? with the normal. What is theindex of refraction of the glass?

6)

A light ray traveling from a higher index of refraction mediuminto a lower index of refraction medium (for example, from waterinto air) would bend away from the normal to the mediumsurface. When the refracted ray is parallel to the boundaryof the medium, ?2= 90?. The incident angle, ?1,becomes ?c, called the

Cauchy angle

critical angle

conjugate angle

classic angle

8{ n Air Glass