Class 10 Light Reflection and Refraction Important Questions
Important Questions Notes Previous Years Questions MCQ Quiz – 1 MCQ Quiz – 2Light Reflection and Refraction Important Questions
- What is the focal length of a plane mirror ?
- Draw a ray diagram to show refraction of a light ray in a glass slab.
- A converging lens has a focal length of 15 cm. An object is placed 60 cm from the lens . Find the position, nature & size of the image.
- Refractive index of diamond with respect to glass is 1.6 and absolute refractive index of glass is 1.5. Find the absolute refractive index of diamond.
- It is desired to obtain an erect image of an object using a concave mirror of focal length 20 cm.
- What should be the range of distance of object from the mirror.
- Will the image be bigger or smaller than object ?
- Draw a ray diagram to show the image formation in this case.
- One half of a convex lens of focal length 20 cm is covered with a black paper.
- Will the lens produce a complete image of the object ?
- Show the formation of image of an object placed at 2F1 of such covered lens with the help of a ray diagram.
- What will be the intensity of the image formed by half covered lens as compared to non-covered lens.
- If the angle of incidence of a ray of light falling on glass surface is 60o and the angle of refraction is 30o. What is the refractive index of glass ?
- Rays from sun converge at a point 15 cm in front of a concave mirror. Where should an object be placed so that size of its image is equal to size of object.
- Size of image of an object by a mirror having a focal length of 20 cm is observed to be reduced to 1/3rd of its size on the screen. At what distance the object has been placed from the mirror? What is the nature of image and the mirror?
- A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm image of awl pin is formed at 30 cm in front of the mirror. What is the focal length of this mirror?
- If a child crawls towards a plane mirror at a rate of 0.20 m/s, then at what speed will the child and her image come nearby to each other?
- A ray of light is propagating from medium A to B. If the refractive index of medium B with respect to A is 1.5, what will be the refractive index of medium A with respect to B?
- State snell’s law with the help of suitable ray diagram.
- Which mirror is used for rear view in vehicles and why?
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