Light - Reflection and Refraction
CBSE Class 10 Science · every board question from this chapter, 2025–2025 · 15 of them repeated across years
- To get an image of magnification -1 on a screen using a lens of focal length 20 cm, the object distance must be:2025asked 3×
- An optical device 'X' is placed obliquely in the path of a narrow parallel beam of light. If the emergent beam gets displaced…2025asked 3×
- An object is placed at a distance of 30 cm from the pole of a concave mirror. If its real and inverted image is formed at 60 cm…2025asked 3×
- In order to obtain large images of the teeth of patients, the dentist holds the concave mirror in such a manner that the teeth…2025asked 3×
- Identify from the following the ray diagram which shows the correct path of the reflected ray for the ray incident on a concave…2025asked 3×
- Mirror 'X' is used to concentrate sunlight in solar furnace and Mirror 'Y' is fitted on the side of the vehicle to see the…2025asked 3×
- In the given figure the angle of incidence and the angle of deviation respectively are:2025
- Consider the following ray diagram: Here, the angle of incidence and angle of deviation respectively are2025
- An object is placed at a distance of 10 cm in front of a concave mirror of focal length 15 cm. Use mirror formula to determine…2025
- During an experiment, a student observes that the given mirror is forming an erect and diminished image for all positions of the…2025
- When an incident ray of light enters a medium 'X' from air, it bends towards the normal. Infer about the following with respect…2025
- An object is placed at a distance of 30 cm in front of a concave mirror of focal length 20 cm. Use mirror formula to determine…2025
- An object is placed at a distance of 60 cm from a concave lens of focal length 30 cm. Use lens formula to find the position of…2025
- Study the figure in which the path of a ray of light going from Medium 1 to Medium 2 is shown. Out of the two Media - Medium 1…2025asked 3×
- The values of absolute refractive indices of kerosene and water are 1.44 and 1.33 respectively. Compare the two media on the…2025
- Out of the two lenses, one concave and the other convex, state which one will diverge a parallel beam of light falling on it.…2025asked 3×
- An object of size 5 cm is placed at a distance of 30 cm from the optical centre of a converging lens of focal length 20 cm. Use…2025
- Draw ray diagrams to show the nature, position and relative size of the image formed by a convex mirror when the object is placed…2025asked 3×
- If we want to obtain a real and magnified image of an object by using a concave mirror of focal length 18 cm. Where should the…2025
- If we want to obtain a virtual and magnified image of an object by using a concave mirror of focal length 18 cm, where should the…2025asked 2×
- The power of a lens is -0.25 D. Based on this information, find out The type of lens and its focal length. The eye defect for…2025asked 3×
- A convex lens forms an 8.0 cm long image of a 2.0 cm long object which is kept at a distance of 6.0 cm from the optical centre of…2025
- An object is placed at a distance of 20 cm from the optical centre of a concave lens and its image is formed on the same side of…2025
- A convex mirror used for rear view on an automobile has a focal length of 1.5 m. If a 3 m high bus is located at 6.0 m from the…2025
- A student placed a candle flame at different distances from a convex lens and focused its image on a screen. He recorded his…2025asked 3×
- (i) "In refraction of light through a rectangular glass slab, the emergent ray is always parallel to the direction of the…2025asked 3×
- Observe the following diagram and compare (i) speed of light and (ii) optical densities of the three media A, B and C. Also give…2025asked 3×
- (i) The power of a lens 'X' is -2•5 D. Name the lens and determine its focal length in cm. For which eye defect of vision will an…2025asked 3×
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