In YDSE pattern with light of wavelength...

In YDSE pattern with light of wavelength `lambda_1 = 500nm`, 15 fringes are obtained on a certain segment of screen. If number of fringes for light of wavelength `lambda_2` on same segment of screen is 10, then the value of `lambda_2` (in nm) is-

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The correct Answer is:

750 nm

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