Atomic And Nuclear Physics - I st Internal Test

Part A - 5 x 2 = 10

1. Define critical potential.
2. State any three properties of positive rays.
3. Write Einstein photo electric equation.
4. State laws of photoelectric effect.
5. Give the principle of mass spectrograph.

Part B - 2 x 5 = 10

1. Describe Bainbridge Mass Spectrograph.
2. Explain Lenard experiment to determine e/m of photoelectrons.

Part C - 2 x 10 = 20

1. Describe the working of Aston mass spectrograph.
2. Describe Millikan experiment to verify Einstein photoelectric equation.