Question

In a Fraunhofer diffraction, due to narrow slit of width 0.03 cm the screen is placed 3m away from the lens used to obtain the pattern. If the first maxima be 5 mm on either side of the central maxima. Find the wavelength of the light used.

Answer 1

Answer:

Distance between the first 2 minimum on other side =

d

2λD

=

2×10

−1

×10

−3

2×5×10

3

×10

−10

×2

=10×

10

−4

10

−7

=10

−2

m