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Band with for red light of wavelength 64...

Band with for red light of wavelength `6400Å` us 0.32 mm. If red lilght is replaced by blue light of wavelength `4800Å`, then the change in bandwidth will be

A

`8xx10^(-6)m`

B

`8xx10^(-5)m`

C

`4xx10^(-6)m`

D

`4xx10^(-5)m`

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The correct Answer is:
B
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