- 1 A Man Stands 10 M In Front Of A Large Plane Mirror How Far Must He Walk Before He Is 5m Away From His Image A 10 C 1 (51.2 KiB) Viewed 59 times
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1. A man stands 10 m in front of a large plane mirror. How far must he walk before he is 5m away from his image? A. 10 cm B. 7.5 m C. 5 m D. 2.5 m 2. What is the focal length of the mirror if an object 3 cm high is placed at a distance of 8 cm from a concave mirror which produces a virtual image 4.5 cm high? A. 21 cm B. 22 cm C. 23 cm D. 24 cm 3. Which of the following distances should a person hold his face from a concave mirror with a focal length of 25 cm so that it may act as a shaving mirror? A. 45 cm B. 20 cm C. 25 cm D. 30 cm 4. What is the distance of the image if an object is placed at a large distance in front of a concave mirror of a radius of curvature of 40 cm? A. 20 cm B. 30 cm C. 40 cm D. 50 cm 5. What is the distance and the radius of curvature of a convex mirror used as a rear-view mirror in a moving car is 2.0m? A truck is coming from behind it at a distance of 3.5 m. A. 0.77 m behind the mirror B. 0.77 m in front of the mirror C. 7.7 m behind the mirror D. 7.7 m in front of the mirror