Ray Optics and Optical Instruments questions
782 published questions with worked solutions.
- In a lake, a fish rising vertically to the surface of water uniformly at the rate of 3 m/s, observes a bird diving vertically...
- A circular beam of light (diameter = d) falls on a plane surface of a liquid. The angle of incidence is 45^ and refractive index...
- Which one of the following is not associated with the total internal reflection?
- The wavelength of light in two liquids x and y is 3500 Å and 7000 Å respectively, then the critical angle of x relative to y will...
- The critical angle of a prism is 30^ . The velocity of light in the medium is
- A ray of light travelling in a transparent medium falls on a surface separating the medium from air at an angle of incidence of...
- A glass slab has a critical angle of 30^ when placed in air. What will be the critical angle when it is placed in liquid of...
- When a ray is refracted from one medium to another, then the wavelength changes from 6000 Å to 4000 Å. The critical angle for the...
- If a ray of light in a denser medium strikes a rarer medium at an angle of incidence i, the angles of reflection and refraction...
- A plano-convex lens is made of glass of refractive index 1.5. The radius of curvature of its convex surface is R. Its focal...
- A plano-convex lens is made of flint glass. Its focal length is
- Distance of an object from a concave lens of focal length 20 cm is 40 cm. Then, linear magnification of the image
- In order to obtain a real image of magnification 2 using converging lens of focal length 20 cm, where should an object be placed
- The real image which is exactly equal to the size of an object is to be obtained on a screen with the help of a convex lens of...
- A plano-convex lens of curvature of 30 cm and refractive index 1.5 produces a real image of an object kept 90 cm from it. What is...
- The minimum distance between an object and its real image formed by a convex lens is
- A convex lens of refractive index 3/2 has a power of 2.5 D. If it is placed in a liquid of refractive index 2, the new power of...
- Two thin lenses of focal lengths f_1 and f_2 are in contact and co-axial. The combination is equivalent to a single lens of power
- Two thin lenses, one of focal length +60 cm and the other of focal length -20 cm are put in contact. The combined focal length is
- A convex lens of focal length 40 cm is in contact with a concave lens of focal length 25 cm. The power of combination is
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