TN Phy, Unit - 8, Dual Nature Of Radiation And Matter

                        Welcome To




Class : XII
Subject : Physics
Unit : 8
Unit Name : Dual Nature Of Radiation And Matter

IMPORTANT QUESTIONS



2 Marks

1. Define work function of a metal. Give its unit.

2. What is photoelectric effect?

3. How will you define threshold frequency?

4. Define stopping potential.




3 Marks


1. List out the laws of photoelectric effect.

2. Give the construction and working of photo emissive cell.

3. Derive an expression for de Broglie wavelength of electrons.

4. Write the applications fo photo cells.


5 Marks


1. Obtain Einstein’s photoelectric equation with necessary explanation.

2. Describe briefly Davisson – Germer experiment which demonstrated the wave nature of electrons.



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