# Quantum Physics Quiz for fun and Quiz Competition Practice 4

Quantum Physics Quiz is here,

## Results

### #5. The study of which of the following is very essential prior to quantum mechanics?

Explanation is given below

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## Quantum Physics Quiz Explanations

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1. It must be 4 femtometer (10-15), which is, in fact, the diameter of the atom.
2. ∇2Ψ(r) = 0 , if Ψ(r) = constant.
So, the first term in the Schrödinger’s wave
equation becomes zero. Hence, it becomes VΨ
= EΨ.
3. All the terms refer to energy which has the
unit MeV (mega electron volt).
4. Momentum, p = (2mE)1/2
5. Hilbert space plays an important role in
quantum mechanics. So, one needs to go
through it before delving deep into quantum
mechanics.

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## Quantum Mechanics Quiz and answers

1. For electron scattering experiment, the de-
Broglie wavelength of electrons used must be of the order of ___.

a. 4 fm ()

b. 1 nm

c. 4 mm

d. 1 zm

1. If Ψ(r) = constant, then Schrödinger’s
equation becomes __ .
a. EΨ = HΨ
b. EΨ = VΨ ()
c. VΨ = 0
d. None of the above
2. Which of the following has unit MeV ?
a. m(c^2)
b. pc
c. hν
d. all of the above ()
3. Which of the following expressions refer to
momentum?
a. 2mE
b. (2mE)^1/2 ()
c. Ec
d. hw
4. The study of which of the following is very
essential prior to quantum mechanics?
a. Astrophysics
b. Chemistry
c. Hilbert Space ()
d. All of the above