Green light of wavelength 5100 Å from a narrow slit is incident on a double slit . If the overall separation of 10 fringes on a screen 200 cm away is

Question

Green light of wavelength 5100 Å from a narrow slit is incident on a double slit . If the overall separation of 10 fringes on a screen 200 cm away is

Green light of wavelength 5100 Å from a narrow slit is incident on a double slit . If the overall separation of 10 fringes on a screen 200 cm away is 2 cm , find slit separation .
A. `5xx10^(-4)` m
B. `2.5xx10^(-2)` m
C. `2.5xx10^(-4)` m
D. `5xx10^(-2)` m

Monjur Alahi

9 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - A
`beta=(2)/(10)cm=2xx10^(-3)m`
As `beta=(lamdaD)/(d)`
`:. d=(lamdaD)/(beta)=(5000xx10^(-10)xx200xx10^(-2))/(2xx10^(-3))`
`=5xx10^(-4)m`

9 views Answered 2023-02-05 15:29