Optics Answers

How long will it take a car to accelerate from 15.2 m/s to 23.5 m/s if the car has an average acceleration of 3.2 m/s

if the sun is 150 million km away from the earth, how long does it take sunlight to reach the earth?

How is image formed on the retina of human eye processed by human brain? Discuss

Show that the superposition of two linearly polarized waves having different amplitude and a finite phase difference can used to be produced for an elliptically polarized light waves.

An object is placed 100 cm in front of a thin lens with focal length 40 cm, which is 200 cm in front of plane mirror. Where is the final image measured from the lens, that would be seen by an eye looking toward the mirror through the lens. What is the transverse magnification of the image? (The light goes from the object through the lens, reflected of the mirror and goes through the lens again.)

13 In practical experiment inloving the use of optical pins, parallax is reduced or removed if on slightly displacing one's eye from side to side
the object and image are not coincident but move together in same directions
the object and image move in opposite directions relative to each other
the object and image are coincident and move together in the same direction
the object and image are coincident and remain stationary
14 In an experiment with a concave mirror, the image of an optical pin which is 4 times its size was cast on on a screen 6m from the object pin. How far from the object pin should the mirror be placed?
8m
6m
3m
2m
15 The image of an object which is between the concave mirror's reflecting surface and its principal focus is
in front of the mirror erect real and diminished
behind the mirror inverted real and diminished
in front of the mirror erect virtual and enlarged
behind the mirror erect virtual and enlarged

10 Which of the following is not true about diverging lens
the principal focus is positive
the principal focus is ngative
they poduce virtual images only
they form virtual, erect and smaller images of real object
11 In an experiment to determine the focal length of a convex lens, 1/u
(cm−1)
(cm−1)
was plotted on horizontal and 1/v
(cm−1)
(cm−1)
on the vertical axis, where u and v have their usual meaning. What is the physical significance of the reciprocal of the intercept on the horizontal axis?
linear magnification
focal length
object distance
image distance
12 In an experiment to determine the focal length of a convex lens, 1/u
(cm−1)
(cm−1)
was plotted on horizontal and 1/v
(cm−1)
(cm−1)
on the vertical axis, where u and v have their usual meaning. What is the physical significance of the reciprocal of the slope of the graph?
linear magnification
focal length
object distance
image distance

d) ‘Diffraction limits the image forming capability of optical devices’. Discuss the authenticity of this statement for the particular case of a microscope

c) Discuss, with necessary theory, how is interference pattern in Young’s double slit experiment modified when a thin glass plate is introduced in the path of one of the interference waves

a) Write down Maxwell’s field equations for free space and obtain expressions for (i) velocity of e.m. waves, and (ii) Poynting Vector. Also discuss its significance