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Optics
An object is placed 60 cm from a screen. Where should you place a convex lens of focal length 15 cm to get the image of the object on the screen?
Optics
An object of size 2 cm is placed 54 cm from a screen. A convex lens of focal length 12 cm is placed between the two such that the image of the object forms on the screen. Find the two possible positions of the lens.
Optics
A concave lens of focal length 20 cm is placed at a distance of 20 cm from a 2 cm object which is placed perpendicularly to the principal axis. Find the size of the image formed.
Optics
A light of amplitude a is incident obliquely on a parallel thin film if r and t represent the fraction of the incident light reflected and transmitted respectively draw the diagram to explain multiple reflection of incident light and write the amplitude of successive rays
Optics
Explain the propagation of light through optical fibre. What are the advantages of
using optical fibres for communication?
using optical fibres for communication?
Optics
With a labelled diagram, discuss the recording a hologram.
Optics
Compare and contrast three level and four level pumping schemes.
Optics
Derive an expression to show that the condition of population inversion is necessary
for laser action.
for laser action.
Optics
A light of amplitude ‘a’ is incident obliquely on a parallel thin film. If ‘r’ and ‘t’
represent the fractions of incident light reflected and transmitted respectively, draw a
diagram to explain multiple reflection of incident light and write the amplitudes of
successive rays.
represent the fractions of incident light reflected and transmitted respectively, draw a
diagram to explain multiple reflection of incident light and write the amplitudes of
successive rays.
Optics
Obtain the conditions for observing maxima and minima in a Young two-slit
interference pattern. Show that these conditions change when a thin transparent
sheet of thickness t and refractive index µ is introduced in the path of one of the
superposing beams.
interference pattern. Show that these conditions change when a thin transparent
sheet of thickness t and refractive index µ is introduced in the path of one of the
superposing beams.
