Question

2. A piece of metal has a cutoff wavelength of Acutoff = 450 nm
Consider illuminating this piece of metal with two different
wavelengths of light: a 41 = 500 nm beam and a A2 = 400 nm beam.
For each of the two beams, find:
(a) The maximum kinetic energy of ejected electrons.
(b) What is their de Broglie wavelength?​

Answer 1

Explanation:

Accumulation of resources in a few hands which in turn, divided the society into rich and poor. Indiscriminate use of resources causing various global ecological crises such as global warming, depletion of the ozone layer, environmental pollution & land degradation.