申論題

13. A pendulum consisting of a 0.01 kg mass is suspended from a string 0.1 m in length. Let the amplitude of its oscillation be such that the string in its extreme positions makes an angle of 11°(cosll° = 0.98) with the vertical. If its energy is quantized, what is the quantum number n (to the nearest order of magnitude)? (g = 10 m/s²) (According to this result, the quantized nature of the energy of the oscillations will not be apparent for large-scale system )