Question

2. Planck’s hypothesis (a) was the basis of Wien’s law, (b) called for the intensity of blackbody radiation to be proportional to 1 / 4 , (c) quantized the energy of thermal atomic oscillators, or (d) predicted the ultraviolet catastrophe.

What is the wavelength of the radiation component of maximum intensity emitted by our bodies? In what region of the EM spectrum is this wavelength?

. A metal with a work function of 2.40 eV is illuminated with a beam of monochromatic light. It is found that the stopping potential for the emitted electrons is 2.50 V. What is the wavelength of the light in nanometers?

.Find the radius of the electron orbit in a hydrogen atom for states with the following principal quantum numbers:(a) n=2; (b) n=4; (c) n=5.

Answer 1