1. A particle in a box quantum model, the particle has ground state (n =1) energ

Question

1. A particle in a box quantum model, the particle has ground state (n =1) energy of 4.0 eV. What is the energy of the photon emitted when it goes from n = 4 to n = 3 state?,

a. 4.0 eV

b. 16 eV

c. 20 eV

d. 28 eV

e. 26 eV

2.The X-rays used in the Compton experiment has a wavelength of 7.02 × 10-12 m. After collision with electron the x-ray photon moves by making an angle of 75 degrees relative to its original direction. What is the wavelength of the scattered photon?

a. 1.80 × 10-12 m

b. 4.59 × 10-12 m

c. 8.82 × 10-12 m

d. It could have any wavelength of 7.02 × 10-12 or longer.

e. It could have any wavelength of 7.02 × 10-12 or shorter.

Explanation / Answer

1)

the energy of the photon emitted

E = E2 - E1 = hv energy of photon going from n = 4 to n = 3
E = - 4 eV[(1/4^2) - (1/3^2)] = 0.1945 eV Answer- C

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