The speed of light in an isotropic medium depends on, ______.

A rod of length 10 cm lies along the principal axis of a concave mirror of focal length 10 cm in such a way that its end closer to the pole is 20 cm away from the mirror. The length of the image is, ______.

When a biconvex lens of glass having refractive index 1.47 is dipped in a liquid, it acts as plane sheet of glass. This implies that the liquid must have refractive index, ______.

The radius of curvature of curved surface at a thin planoconvex lens is 10 cm and the refractive index is 1.5. If the plane surface is silvered, then the focal length will be, ______.

To get three images of a single object, one should have two plane mirror at an angle of ______________.

A man of length h requires a mirror of length at least equal to, to see his own complete image is _______________.

Assertion: Nicol prism is used to produce and analyze plane polarised light.
Reason: Nicol prism reduces the intensity of light to zero.
Codes:
(a) Assertion and Reason are correct and Reason is the correct explanation of Assertion.
(b) Assertion and Reason are true but Reason is the false explanation of the Assertion.
(c) Assertion is true but Reason is false.
(d) Assertion is false but Reason is true.

(a) Angular dispersion produced by a prism depends upon angle of the prism.
(b) Dispersive power is the ability of the material of the prism to cause dispersion.
(c) Dispersive power is a dimensionless quality.
(d) Dispersive power is always negative

(I) The fringe width is inversely proportional to the distance between the two slits.
(II) In Young's experiment, the fringe width for dark fringes is different from that for white fringes.
(III) In Young's experiment, the width of each slit is about 0.05 mm.
(IV) In Young's experiment, the double slit S₁ and S₂ are separated by a distance of about 0.3 mm.
(a) I and II only
(b) I and IV only
(c) I, II and III only
(d) I, II, III and IV

What is optical path? Obtain the equation for optical path.

State the laws of reflection.

What is angle of deviation due to refraction?

What is principle of reversibility?

What is reflection?

Write the difference of real and virtual images by a plane mirror.

Derive the mirror equation and the equation for lateral magnification. 

Describe the Fizeau’s method to determine the speed of light.

Write the conditions for nature of objects and images.

An object is placed at a certain distance from a convex lens of focal length 20 cm. Find the object distance if the image obtained is magnified 4 times.

The focal length of an equiconvex lens is equal to the radius of curvature of either face. What is the value of refractive index of the material of the lens?

Prove the laws of reflection using Huygen's principle.