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8th Standard English Medium Science Subject T1 - Light Book Back 2 Mark Questions with Solution Part - I updated Book back Questions

8th Standard English Medium Science Subject T1 - Light Book Back 2 Mark Questions with Solution Part - I

8th Standard

    Reg.No. :
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Science

Time : 00:30:00 Hrs
Total Marks : 10
    5 x 2 = 10

  1. The radius of curvature of a spherical mirror is 20 cm. Find its focal length.

  2. Focal length of a spherical mirror is 7 cm. What is its radius of curvature?

  3. If two plane mirrors are inclined to each other at an angle of 90°, find the number of images formed.

  4. Speed of light in air is 3 × 108 ms-1 and the speed of light in a medium is 2 × 108 ms-1. Find the refractive index of the medium with respect to air.

  5. Refractive index of water is 4/3 and the refractive index of glass is 3/2. Find the refractive index of glass with respect to the refractive index of water.

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