Optics Answers

What will be the change in frienge pattern in young double slit experiment even if two micafoils having same refracting indecs and thickness L1 and L2 (L1>L2) are placed in the path of interfaring raise

A particle of mass M is released from rest on a rough inclined plane, which makes an
angle of 30° with the horizontal. It is observed that the particle moves a distance of 3 m
in 3 s. What is the particle’s acceleration? Draw a properly labelled free body diagram.
Calculate the coefficient of kinetic friction between the particle and the surface of the
inclined plane.

a photographic instrument has as objective a thin convergent lens of vergence 10diopters.To take the photograph of a far object the eye piece must be placed at which distance from the object

Light travels from crown glass (n=1.52) into air (n=1.00). The angle of refraction in air is 60°. What is the angle of incidence in glass?

Discuss lasing action of a He-Ne laser.

Define numerical aperture and angle of acceptance. An optical fiber has a numerical
aperture of 0.20 and cladding refractive index of 1.59. Calculate the refractive index
of the core material and the acceptance angle of the fibre in water whose refractive
index is 1.33.

Discuss applications of lasers in medicine and communication.

A vertical single and double slits and illuminated by a point source. Discuss the salient
features of their Fraunhofer diffraction patterns. Also, obtain an expression for intensity
distribution in case of double slit.

The inclined faces of a glass biprism (µ = 1.5) make an angle of 1° with its base. The
biprism is illuminated by a sodium lamp (λ = 589 nm) and the eye piece is at a
distance of 1 m from the slit. A convex lens inserted between the biprism and the eye
piece gives clear images of coherent sources in the focal plane of the eye piece. If the
images are 0.4 cm apart in one case and 0.16 cm apart in the second case, calculate
the width of interference fringes observed on the screen.

Show that the radius of a dark Newton’s ring is directly proportional to the square
root of the radius of curvature of the lens used.