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In Fraunhofer diffraction due to a narrow width 0.1mm. The first maxima lies 15.8mm on either side of the central maxima on a screen kept at a distance of 2.5 m from the slit.Calculate the wavelength of the light used?

In Fraunhofer diffraction due to a narrow width 0.1mm. The first maxima lies 15.8mm on either side of the central maxima on a screen kept at a distance of 2.5 m from the slit.Calculate the wavelength of the light used?

Grade:12

1 Answers

Sher Mohammad IIT Delhi
askIITians Faculty 174 Points
6 years ago
using formula,
d_f = \frac {2 \lambda z}{W}
df= 15.8*2
z=2.5m
w=0.1mm
all quantities are known except, lambda , put values and calculate the wavelength.
sher mohammad
askiitians faculty
b.tech, iit delhi

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