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Suppose that one half of a concave mirror reflecting surface is covered with nonreflecting suit. What effect will this have on the image of an object placed infront of mirror?
If a convex lens of focal length (f) is placed between 2 parallel plane mirrors and a object is placed between f and 2f of lens. How many images are formed?
Two coherent sources of intensity ratio 'a'
interfere. Prove that in the interference pattern
(Imax - Imin)/(Imax + Imin )= 2√a/(1+a)
For sodium light (A = 5893 A), interference
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.
A light ray of amplitude 'A' is incident
obliquely on a parallel thin glass film. Draw
a diagram to show the amplitude of
successive rays in multiple reflection and
refraction.
Two narrow slits 0.45 mm apart are
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.
helium - neon laser emits a diffraction
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.
helium - neon laser emits a diffraction
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.
If the
angle subtended at the hologram by the
signal and the reference beam is 15°, what
is the wave length of light used which
produces fringes separated by a distance
1.8micrometer?
Using the stellar interferometer, Michelson
observed for the star Betelgeuse that the
fringes disappear when the distance
between movable mirrors is 65 cm.
Assuming l. = 6 x 10 ^(—5)cm, calculate the
angular diameter of the star.
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