A photon is a bundle of electromagnetic energy. It is the basic unit that makes up all light. The photon is sometimes referred to as a "quantum" of electromagnetic energy. They have zero mass. They have no electric charge. They are stable. They carry energy and momentum which are dependent on the frequency. They can have interactions with other particles such as electrons. They can be destroyed or created by many natural processes. When in empty space, they travel at the speed of light.

The radius of the innermost orbit of hydrogen atom is 5 . 1 × 10 - 10 m . What is the radius of the second orbit?

We know for hydrogen like atom radius of n t h orbit is given by: r = 0 . 529 n 2 Z A ∘ n = prinicipal quantum number of orbit. Z = atomic number r ∝ n 2 Given r 1 = 5 . 1 × 10 - 10 m So radius of the second orbit will be: r 2 = 4 × 5 . 1 × 10 - 10 = 20 . 4 × 10 - 10 m

E M B I B E

Bureau's Higher Secondary Physics Class 12>Chapter 16 - Atomic Physics>MODEL QUESTIONS

MODEL QUESTIONS

Author:Odisha Board

Odisha Board Physics Solutions for Exercise - MODEL QUESTIONS

Simple step-by-step solutions to MODEL QUESTIONS questions of Atomic Physics from Bureau's Higher Secondary Physics Class 12. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.