A sodium atom is in one of the states labelled .Lowest excited levels'. It remains in that.state for an average time of 10-8 sec, before it makes a transition back to a ground state. What is the uncertainty in energy of that excited state ?

see full answer

Talk to JEE/NEET 2025 Toppers - Learn What Actually Works!

Real Strategies. Real People. Real Success Stories - Just 1 call away

An Intiative by Sri Chaitanya

6.56 ×10-8 eV

2 ×10-8 eV

10-8 eV

8 ×10-8 eV

answer is A.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

The average time that the atom spends in this excitedstate is equal to Δt so by using ΔE.Δt=h2π⇒Uncertainty in energy=h/2πΔt

Watch 3-min video & get full concept clarity