Question

The value of Planck's constant is 6.6x10^-34s.If the velocity of light is 3.0 X 10^17nms"-1, the wavelength of radiation in nanometer of a quantum of light with frequency 6.0 x 10^15s^ -1 is plz give an explanation​

Answer 1

Answer: Correct option is

A

4×10  

1

 

Solution:-  

As we know that,

ν=  

λ

c

​

 

⇒λ=  

ν

c

​

 

where,

λ = wavelength of a quantum of light = ?

ν = frequency of a quantum of light = 8×10  

15

s  

−1

 

c = speed of light = 3×10  

8

m/s

∴λ=  

8×10  

15

 

3×10  

8

 

​

=0.375×10  

−7

m=3.75×10  

1

nm(∵1m=10  

9

nm)

Hence, 4×10  

1

 will be the closest value to the wavelength (in nm) of a quantum of light with frequency 8×10  

15

s  

−1

.

Explanation: