A concave mirror is made by cutting a portion of a hollow glass sphere of radius 24cm. Find the focal length of the mirror. 

Correct option is B) negative

Correct option is A) f

C) brightness reduced

 C) \(\cfrac{R}2\)

B) the mirror and the screen

Correct option is C) 20 cm

B) on the same wall as the window

D) The mirror and the screen

Correct option is C) – 54 cm

Correct Answer - A The acceleration of centres of both spheres is `mug` up the incline. Since intial velocity of centres of both spheres is zero, they shall travell same distance...