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Q.

A quanta of light having energy E, has a wavelength equal to 750 nm. Find the wavelength of photon that corresponds to energy .

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answer is 150.

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Detailed Solution

Energy of first light, E1=hcλ1 ... (A) Energy of second light, E2=5E1=hcλ2 ... (B)Dividing equations (A) and (B), we get E1E2=hcλ1×λ2hc=λ2λ1;E15E1=λ2750nmHence, λ2=750nm5=150nm.

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