Atomic physics questions | form six Physics

Prove that de-Broglie wavelength , of electrons of kinetic energy E is given by , 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.

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UNSOLVED

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.

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UNSOLVED

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.

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UNSOLVED

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.

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UNSOLVED

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

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UNSOLVED