In young's double slit experiment, 16 fringes are observed to be formed in a certain segment if wavelength of 600 nm is used. If the wavelength of light is changed to 480 nm , number of fringes observed in the same segment
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a
10
b
20
c
30
d
40
answer is B.
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Detailed Solution
Wavelength λ1=600 nm Wavelength λ2=480 nm Number of fringes n1= 16 Number of fringes n2= ? n1λ1=n2λ2 ⇒n2=n1λ1λ2 =16×600480 ∴ n2=20