List of top Physics Questions on Ray optics and optical instruments asked in MHT CET

What is the working principle behind signal transmission in an optical fiber?

The working of an optical fiber is based on which phenomenon?

A plano-convex lens fits exactly in to a plano-concave lens. Their plane surfaces are parallel to each other. Lenses are made up of different materials of refractive indices \( n_1 \) and \( n_2 \) and \( R \) is the radius of curvature of the curved surface of lenses. Focal length of the combination is

A ray of light travelling through rarer medium is incident at a very small angle \( \theta \) on a glass slab and after refraction its velocity is reduced by 20%. The angle of deviation is

Two current carrying identical coils are kept as shown in figure. The magnetic field at centre 'O' is (N and R represent the number of turns and radius of each coil respectively, $\mu_0$ = permeability of free space)

The amount of work done in blowing a soap bubble such that its diameter increases from $d_1$ to $d_2$ is (T = surface tension of soap solution)

Three immiscible transparent liquids with indices \(3/2\), \(4/3\) and \(6/5\) are arranged one above the other. The depths are \(3 \text{ cm}\), \(4 \text{ cm}\) and \(6 \text{ cm}\) respectively. The apparent depth of the vessel is.

Two charges \(q_1 = +6q\) and \(q_2 = -3q\) placed as shown in figure. A proton is placed on x-axis away from \(q_2\). To remain proton in equilibrium, the distance between \(q_1\) and proton is

Black sphere of radius \(\text{R}\) radiates power \(\text{P}\) at certain temperature \(T\). If the temperature is doubled, the radius gets doubled. Now the power radiated would be

Three immiscible transparent liquids with indices \(3/2\), \(4/3\) and \(6/5\) are arranged one above the other. The depths are \(3 \text{ cm}\), \(4 \text{ cm}\) and \(6 \text{ cm}\) respectively. The apparent depth of the vessel is.

The excess pressure inside a soap bubble is 1.5 times the excess pressure inside a second soap bubble. The volume of the second bubble is ' \( x \) ' times the volume of the first bubble. The value of ' \( x \) ' is

A particle performing linear S.H.M. has period 8 seconds. At time t = 0, it is in the mean position. The ratio of the distances travelled by the particle in the \( 1^{\text{st}} \) and \( 2^{\text{nd}} \) second is (\( \cos 45^\circ = 1/\sqrt{2} \))}

Three immiscible transparent liquids with indices \(3/2\), \(4/3\) and \(6/5\) are arranged one above the other. The depths are \(3 \text{ cm}\), \(4 \text{ cm}\) and \(6 \text{ cm}\) respectively. The apparent depth of the vessel is.

A concave mirror has a focal length of 15 cm. An object is placed 30 cm from the mirror. What is the image distance?

A transparent sphere of refractive index ' \(\mu\) ' and radius of curvature ' \(R\) ' is kept in air. A point object is placed at a distance ' \(d\) ' from the surface of the sphere so that the real image is formed at the same distance ' \(d\) ' from exactly opposite side of the sphere. The distance ' \(d\) ' is

A thin concavo-convex lens with convex face receiving incident rays has radii of curvatures \( 12 \text{ cm} \) and \( 24 \text{ cm} \) respectively. If refractive index of material of lens is \( 1.5 \), then the focal length of the lens is

The rays of different colours fail to converge at a point after passing through a thick converging lens. This defect is called

The angle of prism is A and one of its refracting surface is silvered. Light rays falling at an angle of incidence '2A' on the first surface return back through the same path after suffering reflection at the silvered surface. The refractive index of the material of the prism is

When a monochromatic ray of light is passed through an equilateral glass prism, it is found that the refracted ray in glass is parallel to the base of the prism. If '$i$' and '$e$' denote the angles of incidence and emergence respectively, then}