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Atomic physics questions

Atomic physics questions | form six Physics

Find Atomic physics examination questions, form six Physics in acaproso.com

# Question
1

Why is high temperature required to cause nuclear fusion?


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2

What do you understand by the term photon.


Short answers
3

List down any three properties of a photon.


Short answers
4

State any four laws of photoelectric emission.


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5

Briefly explain what lead de-Broglie to think that the material particles may also show wave nature and why the wave nature of matter not noticeable in our daily observations?


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6

Prove that de-Broglie wavelength lambda, of electrons of kinetic energy E is given by lambda=frac{h}{sqrt{2meV}}, where m is the mass of the electron, e is the charge of the electron, h is the Planck`s constant and V is the accelerating potential difference.


Mathematical Calculation
7

Light of wavelength 488nm is produced by an argon laser which is used in the photoelectric effect. When light from this spectral line is incident on the emmitter, the stopping (cut-off) potential of photoelectrons is 0.38V. Find the work function of the material from which the emitter is made.


Mathematical Calculation
8

Use the concept of radioactive decay and nuclear reactions to define the following terms:

  1. Alpha decay
  2. Beta decay
  3. Gamma decay
  4. Fission
  5. Fusion

For each of the terms in (1-v) , give one suitable reaction equation.


Short answers
9

A freshly prepared sample of a radioactive isotope Y contains 1012 atoms. The half-life of the isotope is 15 hours. Calculate;

  1. the initial activity
  2. the number of radioactive atoms of Y remaining after 2 hours.

Mathematical Calculation
10

Mention any four important features in the design of a nuclear reactor.


Short answers