Ray Optics and Optical Instruments questions
782 published questions with worked solutions.
- Concave mirror is used in headlights of vehicles, because it
- A rainbow is produced due to which one of the following phenomena ?
- Which one of the following is the natural phenomenon based on which a simple periscope works ?
- Which one of the following statements about the refractive index of a material medium with respect to air is correct ?
- Two convex lenses with power 2 dioptre are kept in contact with each other. The focal length of the combined lens system is
- Consider the following statements about a microscope and a telescope : 1. Both the eyepiece and the objective of a microscope are...
- If the focal length of a convex lens is 50 cm, which one of the following is its power?
- The refractive indices of two media are denoted by n_1 and n_2, and the velocities of light in these two media are respectively...
- Which one of the following statements is correct for a plane mirror?
- An object is placed in front of a convex mirror. Which one of the following statements is correct?
- The light energy escaping from the Sun can be spread by
- The focal length of the objective lens of a telescope is 50 cm. If the magnification of the telescope is 25, then the focal...
- The Sun is seen little before it rises and for a short while after it sets. This is because of
- When a beam of white light passes through a glass prism, the colour of light beam that deviates the least is
- Which one of the following statements regarding lenses is not correct ?
- Light rays move in straight lines. But through an optical fibre, they can move in any type of zigzag path because
- The correct relation between the radius of curvature R and focal length f of a spherical mirror is
- A lemon kept in water in a glass tumbler appears to be larger than its actual size. It is because of
- Name the scientist who first used a glass prism to obtain the spectrum of sunlight
- A lens has a power of +2·0 Dioptre. Which one of the following statements about the lens is true ?
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