Question

Real object is located at the zero and of a metre stick a concave mirror located at hundred centimetre and of a metre stick forms an image of the object at 70 cm position a convex mirror placed at 60cm position for my final image at the 10 cm. What is radius of curvature of convex mirror

Answer 1

Answer:

here for a 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 an 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

the radius of curvature for convex mirror = 2 * focal length of a convex mirror.

radius of curvature for convex mirror = 2 *12.5 =25 cm

Answer 2

Explanation:

25cm

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