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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
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.