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

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, ______.

A ray of light travelling in a transparent medium of refractive index n falls, on a surface separating the medium from air at an angle of incidents of 45^o . The ray can undergo total internal reflection for the following n, ______.

The light reflected by plane mirror may form a real images ____________.

Ray optics is valid, when characteristic dimensions are ______________.

A man having a height of 6 m, wants to see full height in the mirror. They observe the image of 2 m height erect, then used mirror is ____________.

A point object is placed at a distance of 30 cm from a convex mirror of focal length 30 cm, The image will from at ______________.

A concave mirror of focal length 15 cm forms an image having twice the linear dimensions of the object. The position of the object when the image is virtual will be ______________.

A convex mirror has a focal length f. A real object is placed at a distance Jin front the pole produces an image at ____________.

All of the following statement are correct except _____________.

A virtual image three times the size of the object is obtained with a concave mirror of radius of curvature 36 cm, The distance of the object from the mirror is _____________.

A dice is placed with its one edge parallel to the principal axis between the principal focus and the centre to the curvature of a concave mirror. Then the image has the shape of _____________.

Aluminous object is placed 20 cm from the surface of a convex mirror and a plane mirror is set so that virtual images formed in two mirrors coincide. If plane mirror is at a distance of 12 cm from the object. Then the focal length of convex mirror is _____________.

A cube of side 2m is placed in front of a concave mirror focal length 1m with its face P at a distance of 3m and face Q at a distance of 5m from the mirror. The distance between the images of face P and Q and height of images P and Q are ________________.

A concave mirror forms an image of sun at a distance of 12 cm from it __________.

What are critical angle and total internal reflection?

Arrive at lens equation from lens maker’s formula.

What is Rayleigh’s scattering?

What type of lens is formed by a bubble inside water?

When a wave undergoes reflection at a denser medium, what happens to its phase?

What is meant by focal plane?

What is simultaneous reflection?

Define angle of deviation d.

A convex lens (n = 1.5) of focal length f_s immersed
(I) In water n = 1.33 and
(ii) In carbon disulphide n = 1.6, how does the lens behave in the two cases?

A ray of light incident on a concave lens becomes parallel to the principal axis after refraction. Show this situation with the help of a ray diagram.

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

Obtain the equation for radius of illumination (or) Snell’s window.

Derive the equation for angle of deviation produced by a prism and thus obtain the equation for refractive index of material of the prism.

Prove that for the same incident light when a reflecting surface is tilted by an angle θ, the reflected light will be tilted by an angle 2θ.

Light travels from air into a glass slab of thickness 50 cm and refractive index 1.5.
(i) What is the speed of light in the glass?
(ii) What is the time taken by the light to travel through the glass slab?
(iii) What is the optical path of the glass slab?

Find the position of the image of a point object O in the two cases given. Take the radius of curvature of the surface R as 15 cm, n₁ = 1 and n₂ = 2.
Case i) O is located 10 cm to the left of the surface.
Case ii) O is located 30 cm to the left of the surface.

Determine the focal length of the lens made up of a material of refractive index 1.52 as shown in the diagram. (Points C₁ and C₂ are the centers of curvature of the first and second surfaces respectively.)

If the focal length is 150 cm for a lens, what is the power of the lens?

Light ray falls at normal incidence on the first face and emerges gracing the second face for an equilateral prism.
(a) What is the angle of deviation produced?
(b) What is the refractive index of the material of the prism?

What is focus (or) focal point of a mirror?

A thin converging lens of refractive index 1.5 has a power of + 5.0 D. When this lens is immersed in a liquid of refractive index n, it acts as a divergent lens of focal length 100 cm. What must be the value of n?

Calculate the distance upto which ray optics is a good approximation for light of wavelength 500 nm falls on an aperture of width 0.5 mm.

A diffraction grating consists of 4000 slits per centimeter. It is illuminated by a monochromatic light. The second order diffraction maximum is produced at an angle of 30°. What is the wavelength of the light used?

What is the angle at which a glass plate of refractive index 1.65 is to be kept with respect to the horizontal surface so that an unpolarised light travelling horizontal after reflection from the glass plate is found to be plane polarised?

A ray of light falls on a transparent sphere with centre C as shown in the figure. The ray emerges from the sphere paralled to the line AB. Find the angle of refraction at A if refraction index of the material of the sphere is \(\sqrt { 3 } \). 

A ray of light passes through an equilateral glass prism such that the angle of incidence is equal to the angle of emergence. The angle of emergence is \(\frac { 3 }{ 4 } \) times the angle of prism. Calculate the refractive index of the glass prism.

Calculate the angle of dispersion between red and violet colours produced by a flint glass prism of refracting angle of 600. Given μ_v = 1.633 and = μ_r 1.622.

A convex lens, of focal length 20 cm, has a point object placed on its principal axis at distance of 40 cm from it. A plane mirror is placed 30 cm behind the convex lens. Locate the position of image formed by this combination.