0

Guest

Courses New

The number of photons of light of ν reciprocal =2.5*10^6 m^-1 necessary to provide 1J of energy are a) 2*10^18. b)2*10^17 c)2*10^20. d) 2*10^19

The number of photons of light of ν reciprocal =2.5*10^6 m^-1 necessary to provide 1J of energy are
a) 2*10^18.                   b)2*10^17
c)2*10^20.                     d) 2*10^19
         

Grade:11

1 Answers

Jobin C J
22 Points
5 years ago
E=nhν
 
But ν=c/λ
 
So we can write E=nhc/λ
 
E=nhc/λ  ⇒  E=nhc×1/λ
 
But ṽ=1/λ
 
So E=nhcṽ
 
E=1J,  h=6.63×10-34Js, C=3×108ms-1, ṽ=2.5×106m-1
 
n= E/(hcṽ)
 
n= 1/(6.63×10-34 × 3×108 × 2.5×106)
 
n= 2×1018
 
Option 'a' is correct.

Think You Can Provide A Better Answer ?

Other Related Questions on Physical Chemistry

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More