When an electromagnetic wave falls on a white, perfectly reflecting surface, it exerts a force F on that surface. If the surface is now painted a perfectly absorbing black, what will be the force that the same wave will exert on the surface?
A) 4F
B) 2F
C) F
D) F/2
E) F/4
Question 2
An electron is confined in a harmonic oscillator potential well. A photon is emitted when the electron undergoes a 31 quantum jump.
What is the wavelength of the emission if the net force on the electron behaves as though it has a spring constant of 9.6 N/m? (mel = 9.11 10-31 kg, c = 3.00 108 m/s, 1 eV = 1.60 10-19 J, h = 1.055 10-34 J s, h = 6.626 10-34 J s)
A) 290 nm
B) 150 nm
C) 190 nm
D) 580 nm