Important Questions For Light Reflection And Refraction | 10th Science Important Questions

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Answer The Following Questions (Type 2)

  1. What type of mirror a spoon is on bulging outside?
  2. Name the mirror which can produce real as well as virtual image.
  3. Name a mirror that always gives a virtual, erect and diminished image of an object.
  4. How can you distinguish between a plane mirror, a convex mirror and a concave mirror without touching them?
  5. A man standing in front of a special mirror find his image having a very small head, a fat body and legs of normal size. What are the shapes of three parts of the mirror?
  6. Write the sign convention used in mirrors.
  7. State the relation between object distance, image distance and focal length of a mirror.
  8. Define linear magnification produced by a mirror.
  9. A mirror has a magnification 0.4, what type of the mirror and what type of the image is formed?
  10. What do you mean by “refraction of light”? What is the cause of refraction of light?
  11. State the laws of refraction of light.
  12. Define Snell’s law of refraction of light.
  13. What happens when a ray of light travelling in air falls on the surface of a glass slab?
  14. Draw a labeled ray diagram to show refraction through a glass slab, showing incident ray, refracted ray normal, emergent ray, angle of incidence angle of refraction, angle of emergence and lateral displacement.
  15. A ray of light travelling in air enters obliquely into water. Does the light ray bend towards the normal or away from the normal? Why? (NCERT)
  16. What happens to the ray of light when it falls normally on the glass slab?
  17. Can angle of incidence be equal to the angle of refraction when a ray passes from one medium to another medium? Support your answer with reason.
  18. What do you mean by “lateral displacement” Write the factors on which it depends.
  19. Name the lens which (i) converges (ii) diverges the rays of light.
  20. What is the difference between a convex and concave lens?
  21. State Cartesian sign convention for lens.
  22. Define the following terms (for a spherical lens): (i) Optical centre (ii) Principal axis (v) Principal focus (vi) Focal length
  23. A 1 cm high object is placed at a distance of 2f from a convex lens. What is the height of image formed?
  24. Where an object should be placed in order to use a convex lens as magnifying glass.
  25. Draw ray diagram to show the formation of images when the object is placed in front of a convex lens (i) between the optical centre and focus (ii) between F1 and 2F1  (iii) at 2F1 (iv) at F1 (v) at infinity (vi) beyond 2F1.
  26. Draw ray diagram to show the formation of images when the object is placed in front of a concave lens (i) anywhere between the optical centre and infinity (ii) at infinity.
  27. One wants to see an enlarged and virtual image of an object in a lens. What type of lens should one use?
  28. Will focal length of a glass lens changes when put in water.
  29. One half of a convex lens is covered with a black paper. Will this lens produce a complete image of the object? Verify your answer experimentally. Explain your observations. (NCERT)
  30. Name the phenomenon due to which a pool of water appears less deep than it really is.
  31. State three effects caused by the refraction of light.
  32. Draw a ray diagram to show why a stick half immersed in water appears to be bent at the surface.
  33. Define refractive index. What is the unit of refractive index?
  34. Define absolute refractive index. Can absolute refractive index be less than one?
  35. Refractive index of media A, B, C and D are
MediaABCD
Refractive index1.331.521.441.65
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