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In the YDSE conducted with white light (...

In the YDSE conducted with white light (4000Å-7000Å), consider a point `P_(1)` on the screen at `y_(1)` = 0.2mm. Determine the wavelengths which form maxima at these points :

A

(a)`3000 Å`

B

(b)`4000 Å`

C

(c)`5000Å`

D

(d)`7000Å`

Text Solution

Verified by Experts

The correct Answer is:
C
The optical path difference at `P_(1)` is
`P_(1) = (d y_(1))/(D) = ((10)/(4000)) (0.2) = 5 xx 10^(-4) mm= 5000Å`
`therefore` The wavelength which forms maxima at P is `lamda = 5000Å`
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