Question

A sample of hydrogen gas contains 300 atoms. Each atom is supplied with 10.2 electron volt of energy. During the excitation maximum number of spectral lines observed are

Answer 1

nitrogen is the correct answer

Answer 2

Maximum energy of one photon = 48/ 49 Rch

n = 6

Maximum number of photons that can be emitted here = 600

Explanation:

Given:

Number of atoms, n =100

Energy released by all the n atoms is E = 4800 / 49 Rch

Find: Maximum energy of one photon as they come to ground stat.

Solution:

Maximum energy of one photon = E / n = (4800 / 49) / 100 = 48/ 49 Rch

Maximum number of photons emitted:

48/49 Rch = Rch (1/1² - 1/n`²)

Solving we get n` = 7

Therefore n = 6

Hence maximum number of photons that can be emitted here = 600.