Question

A small metallic spherical ball is placed little away from the centre of a large concave mirror of radius of curvature 2.5 cm. When the ball is released, it begins to oscillate, in SHM with time period- (g = 10 m/s²)

• A. 3.042 s
• B. 0.3142 s
• C. 3.542 s
• D. 3.142 s

Answer 1

Answer: (B)

0.3142 s

Answer 2

$\sqrt { \frac { 2.5 \times 10 ^ { - 2 } } { 10 } }$ = 0.3142 s