MTG NEET Physics

The size of the image of an object, which is at infinity, as formed by a convex lens of focal length 30 cm is 2 cm. If a concave lens of focal length 20 cm is placed between the convex lens and the image at a distance of 26 cm from the convex lens, calculate [...]

The power of convex lens is 2 dioptres. its power is to be reduced to 1.5 dioptres, by pitting another lens in combination with it. Which of the following lenses will serve the purpose ? by pitting another lens in combination with it. Which of the following lenses will serve the purpose ? The power [...]

A,B and C are the parallel sided transparent media of refractive index n1,n2 and n3 respectively. They are arranged as shown in the figure. A ray is incident at an angle θ on the surface of separation of A and B which is as shown in the figure. After the refraction into the medium B, [...]

The time required for the light to pass through a glass slab ( refractive index=1.5) of thickness u mm is (c=3×10^8 ms^−1 speed of light in free space) The time required for the light to pass through a glass slab ( refractive index=1.5) of thickness u mm is (c=3×10^8 ms^−1 speed of light in free [...]

Velocity of light in air is 3 x 10^8 m/s and refractive index of water is 1.33 . The time taken by the light to travel a distance of 500 m in water is Velocity of light in air is 3 x 10^8 m/s and refractive index of water is 1.33 . The time taken [...]

If the velocity of light in vacuum is 3×10^8 ms^−1 , the time taken (in nanosecond) to travel through a glass plate of thickness 10 cm and refractive index 1.5 is : If the velocity of light in vacuum is 3×10^8 ms^−1 the time taken (in nanosecond) to travel through a glass plate of thickness [...]

Critical angle for light going from medium (i) to (ii) is θ. The speed of light in medium (i) is v, then the speed of light in medium (ii) is Critical angle for light going from medium (i) to (ii) is θ. The speed of light in medium (i) is v then the speed of [...]

If the speed of light in material A is 1.25 times its speed in material B, then the ratio of the refractive indices of these materials is If the speed of light in material A is 1.25 times its speed in material B then the ratio of the refractive indices of these materials is November [...]

A point source of light is kept at a depth of h in water of refractive index 4/3. The radius of the circle at the surface of water through which light emits is A point source of light is kept at a depth of h in water of refractive index 4/3. The radius of the [...]

A ray of light enters from a rarer to a denser medium. The angle of incidence is i. Then the reflected and refracted rays are mutually perpendicular to each other. The critical angle for the pair of media is Light travels through a glass plate of thickness t and refractive index μ. If c is [...]