numericlight7-18 - TYPICAL NUMERIC QUESTIONS FOR PHYSICS I...

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TYPICAL NUMERIC QUESTIONS FOR PHYSICS I REGULAR QUESTIONS TAKEN FROM CUTNELL AND JOHNSON LIGHT AND OPTICS 1. A ray of light is reflected from two plane mirror surfaces as shown in the figure. What are the correct values of α and β ? Value of α Value of β A) 26° 26° B) 26° 64° C) 38° 52° D) 52° 26° E) 64° 26° 2. An object is placed 1 m in front of a plane mirror. An observer stands 3 m behind the object. For what distance must the observer focus his eyes in order to see the image of the object? A) 1 m B) 2 m C) 3 m D) 4 m E) 5 m 3. The focal length of a spherical concave mirror is 20 cm. What is its radius of curvature? 4. The radius of curvature of a spherical convex mirror is 50 cm. What is its focal length? Page 1
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