Question

Calculate the wave number of radiation having a frequency of 4*10^11Hz.​

Answer 1

Answer:

ans: 1.33×10^6m-1

Explanation:

Wave no.=1/wave length

Wave no.= frequency/speed

Speed of light=30×10^8

Wave no.=4×10^14/3×10^8

=1.33×10^6m-1 --answer

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Answer 2

Answer:

Answer is 1.33* 10^6 metre inverse

Explanation:

Given that Frequency of radiation = 4* 10^14hz=4*10^14s^-1

we know that required formula is:

wave length = speed/ Frequency

wave number = 1/ wave length

Therefore wave number = frequency/ speed

speed of light is 3*10^8 m/s

wave number = 4*10^14/3*10^8=1.33

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