Dual Nature of Radiation and Matter_(7-5-2015)

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1. Define Photo electric effect ? 2M

A)

2. In how many ways electrons can be emitted from metal ? 2M

A)

3. Why wave theory failed to explain photoelectric effect ? any one reason 2M

A)

4. Write Einstein Photo electric equation and explain the terms ? 2M

A)

5. Define Debroglie Hypothesis ? Write an expression for it ? 2M

A)

Answer all the questions , Each question carries one mark :

1. Photon has Rest mass ----------------------

2. Photo electric effect can be explained based on ----------------------- nature of light.

3. The angle of deflection of photons when electric field is applied ---------------------

4. Stopping potential depends on ------------------------ of light.

5. Photo electric current is directly proportional to ------------------------------

6. The magnitude of momentum of photon is given by --------------------------------

7. Debroglie proposed -------------------------------------------- Nature of matter.

8. The wavelength of matter waves associated with the body at rest is given by -------------------

9. ------------------------------------- experiment proved Dual nature of matter.

10. The Wavelength of matter waves when accelerated though a potential V is given by -------------------

Dual Nature of Radiation and Matter_(7-5-2015)

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