Term 1 Light Three Marks Questions

9th Standard

    Reg.No. :
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Science

Time : 01:00:00 Hrs
Total Marks : 30
    10 x 3 = 30
  1. An object 2 cm high is placed at a distance of 16 cm from a concave mirror which produces a real image 3 cm high. Find the position of the image.

  2. a) Complete the diagram to show how a concave mirror forms the image of the object.
    b) What is the nature of the image?

  3. Pick out the concave and convex mirrors from the following and tabulate them
    Rear-view mirror, Dentist’s mirror, Torch-light mirror, Mirrors in shopping malls, Make-up mirror.

  4. State the direction of incident ray which after reflection from a spherical mirror retraces its path. Give reason for your answer.

  5. What is meant by magnification? Write its expression. What is its sign for the
    a) real image b) virtual image

  6. Write the spherical mirror formula and explain the meaning of each symbol used in it.

  7. What is the unit of refractive index?

  8. Which has higher refractive index water or glass?

  9. When does total internal reflection take place?

  10. Name some total internal reflection events taken place in nature.

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