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Where n is refractive index

Assume: The lens is made of glass whose index of refraction is 1.51.

Note: This is the same lens that is shown in the figure above.

What is the focal length of this lens? Answer in units of cm.

interfere. Prove that in the interference pattern

(Imax - Imin)/(Imax + Imin )= 2√a/(1+a)

fringes are formed by reflection from a thin

air wedge. When viewed at 90°, 8 fringes are

observed in a distance of 0.8 cm. Calculate

the angle of the wedge.

obliquely on a parallel thin glass film. Draw

a diagram to show the amplitude of

successive rays in multiple reflection and

refraction.

illuminated by a monochromatic light of

wavelength 5893 A. Calculate the width of

the fringes obtained on a screen placed at a

distance of 45 cm from the slits.

limited beam (X = 600 nm) of diameter

3 x 10 - 3m. Calculate the diameter of the

light patch produced on the surface of moon

at a distance of 376 >: 103 km from the Earth.

Assume that scattering in Earth's

atmosphere can be ignored.