Physics Answers

Is it possible to see inside an atom?

A hydrogen atom is 5.3 × 10−10 m in radius. Use the uncertainty principle to estimate the minimum energy an electron can have in this atom. 

A typical atomic nucleus is about 5 × 10−15 m in radius. Use the uncertainty principle to place a lower limit on the energy an electron must have if it is to be part of a nucleus. 

What is a quantum? 

 Compare QM and classical results.

Explain the atomic spectrum of the Hydrogen using Bohr Model.

Discuss one application of Photoelectric effect.

 Derive the formula for Compton effect. Explain all the parameters involved.

Using the Plank’s theory, show that ρ(ν)dν = 8πν2 c 3 hν e hν kBT − 1 dν

 Using the classical theory, derive the formula ρ(ν)dν = 8πν2 c 3 kBT dν for the blackbody radiation where ρ(ν) is the energy per unit of volume in the frequency interval ν to ν + dν of the blackbody spectrum of a cavity at temperature T.