Ray Optics and Optical Instruments questions
782 published questions with worked solutions.
- If sunlight is focused on a paper using convex lens, it starts burning the paper in shortest time when the lens is kept at 30 cm...
- A convex lens is made from glass material having refractive index of 1.4 with same radius of curvature on both sides. The ratio...
- A thin convex lens and a thin concave lens are kept in contact and are co-axial. Which of the following statements is correct for...
- An object AB is placed 15 cm on the left of a convex lens P of focal length 10 cm. Another convex lens Q is now placed 15 cm...
- A ray of light passing through an equilateral prism is having velocity 2.12×10⁸ m/s in the prism material, then the minimum angle...
- A compound microscope is designed with two symmetric biconvex lenses. The objective lens is cut vertically, creating two...
- Angle of minimum deviation is equal to the half of the angle of prism in an equilateral prism. The refractive index of the prism...
- A concave mirror of focal length 10 cm forms an image which is double the size of object when the object is placed at two...
- A thin biconvex lens is prepared from the glass (μ = 1.5) both curved surfaces of which have equal radii of 20 cm each. Left side...
- Light travels a distance x in time t_1 in air and 10x in time t_2 in another denser medium. What is the critical angle for this...
- Two thin lenses are of same focal lengths (f), but one is convex and the other one is concave. When they are placed in contact...
- A convex lens 'A' of focal length 20 cm and a concave lens 'B' of focal length 5 cm are kept along the same axis with a distance...
- A lens of large focal length and large aperture is best suited as an objective of an astronomical telescope since :
- Given below are two statements: Statement (I): When an object is placed at the centre of curvature of a concave lens, image is...
- If the refractive index of the material of a prism is ( A2 ), where A is the angle of prism then angle of minimum deviation will...
- A biconvex lens of refractive index 1.5 has a focal length of 20 cm in air. Its focal length when immersed in a liquid of...
- A convex mirror of radius of curvature 30 cm forms an image that is half the size of the object. The object distance is-
- The distance between object and its two times magnified real image as produced by a convex lens is 45 cm. The focal length of the...
- Light from a point source in air falls on a convex curved surface of radius 20 cm and refractive index 1.5. If source is located...
- The refractive index of a prism with apex angle A is cot(A/2). The angle of minimum deviation is :
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