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Object on a screen located5 m from the object. (a) Describe the type of mirrorrequired. (b) Where should the mirror be positionedrelative to the object?(Ans 2.08.com1. A real object is located at the zero end of a meterstick. A concave mirror located at the 100 cmend ofthe meter stick forms an image of the objectat the70 cm position. A convex mirror placed at the60 cm position forms a final image at the10 cm point. What is the radius of curvature of theconvex mirror?2. A spherical convex mirror has a radias of 40 cm. |
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Answer» Step-by-step explanation: here for concave mirror u = 100 cm. v= 70 cm. we know 1/f = 1/v +1/u. 1/f =1/100 +1/70 on solving f =7000/170 =41.17 cm. radius of curvature for concave mirror = 2 * 41.7 cm = 82.35 cm
for convex mirror image formed by concave mirror ACT as OBJECT for comvex mirror so for convex mirror u = -10 cm. v= 50 cm. again 1/f = 1/v +1/u 1/f = 1/50 -1/10. 1/f =(1-5)/50. 1/f = -4/50 1/f = -4/50 f= -50/4. f= -12.5 cm radius of curvature for convex mirror = 2 * focal length of convex mirror. radius of curvature for convex mirror = 2 *12.5 =25 cm. |
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