30) A thin flashlight beam traveling in air strikes a glass plate at an angle of

Question

30) A thin flashlight beam traveling in air strikes a glass plate at an angle of 520 with the plane of the surface of the plate. If the index of refraction of the glass is 1.4, what angle will the beam make with the normal in the glass? A) 34° B) 64° C) 26° D) 56 E) 38° 31) An object that is 3.4 mm tall is placed 25 cm from the vertex of a convex spherical mirror. The radius of curvature of the mirror has magnitude 74 cm. (a) How far is the image from the vertex of the mirror? (b) What is the height of the image?

Explanation / Answer

Option E

Angle between incident ray and normal=90-Angle between angle between incident ray and surface.

90-52=38.

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