Ray Optics and Optical Instruments questions
782 published questions with worked solutions.
- For an object placed at a distance 2.4 m from a lens, a sharp focused image is observed on a screen placed at a distance 12 cm...
- Time taken by light to travel in two different materials A and B of refractive indices _ A and _ B of same thickness is t_ 1 and...
- A light wave travelling linearly in a medium of dielectric constant 4, incidents on the horizontal interface separating medium...
- The difference of speed of light in the two media A and B, ( _ A - _ B ) is 2.6 10^ 7 m/s. If the refractive index of medium B is...
- Light travels in two media M_ 1 and M_ 2 with speeds 1.5 10^ 8 ms^ -1 and 2.0 10^ 8 ms^ -1 respectively. The critical angle...
- A 2 meter long scale with least count of 0.2 cm is used to measure the locations of objects on an optical bench. While measuring...
- The focal length of a thin biconvex lens is 20cm. When an object is moved from a distance of 25cm in front of it to 50cm, the...
- A biconvex lens of focal length 15 cm is in front of a plane mirror. The distance between the lens and the mirror is 10 cm. A...
- Image of an object approaching a convex mirror of radius of curvature 20 m along its optical axis is observed to move from 25 3 m...
- A large glass slab ( = 5/3) of thickness 8 cm is placed over a point source of light on a plane surface. It is seen that light...
- A ray of light travelling in the direction 1 2 ( i + 3 j ) is incident on a plane mirror. After reflection, it travels along the...
- The image of an object, formed by a plano-convex lens at a distance of 8 m behind the lens, is real and is one-third the size of...
- A plano-convex lens is made of a material of refractive index n. When a small object is placed 30 cm away in front of the curved...
- For an isosceles prism of angle A and refractive index , it is found that the angle of minimum deviation _m=A. Which of the...
- Sunlight of intensity 1.3 kW ,m^ -2 is incident normally on a thin convex lens of focal length 20 cm. Ignore the energy loss of...
- When a ray of light enters a glass slab, then
- If the image of an object, formed by a concave mirror is virtual, erect and magnified, then the object is placed
- An optical illusion which occurs mainly in deserts during hot summer is based on the principle of
- Which one of the following statements is correct about the magnification of an optical microscope ?
- The radii of curvature of the faces of a double convex lens are 10 cm and 20 cm. The refractive index of the glass is 1·5. What...
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