The part of the eye that controls the amount of light entering is MCQ with Answer and Explanation

Explanation:
Kinetic energy K = p²/(2m). If p becomes 2p (100% increase), K' = (2p)²/(2m) = 4p²/(2m) = 4K. So increase = 4K - K = 3K, i.e., 300% increase. Common mistake: think linear. Remember quadratic relationship. Percent increase = (new-old)/old × 100% = (4K-K)/K ×100 = 300%.

Explanation:
RADAR uses microwaves (short wavelength radio waves). Often classified as microwaves.

Explanation:
T = 1/f = 1/1000 = 0.001 s = 1 ms. Millisecond. For higher frequency, period shorter.