If the length of a simple pendulum is quadrupled (increased by a factor of 4), what happens to its time period? MCQ with Answer and Explanation

Explanation:
According to the rules of significant figures, leading zeros (0.00) are never significant as they only indicate the position of the decimal point. However, trailing zeros after a decimal point are always significant. Therefore, in 0.0050200, the significant digits are 5, 0, 2, 0, and 0, making a total of 5 significant figures.

Explanation:
For myopia, corrective lens forms image of distant object at far point. 1/f = 1/(-far point) - 1/(-∞) => -2 = -1/F => F = 0.5 m = 50 cm.

Explanation:
Rayleigh scattering by air molecules, shorter wavelengths (blue) scattered more.