Light English Medium Free Online Test 1 Mark Questions with Answer Key 2020 - 2021

9th Standard

    Reg.No. :
  •  
  •  
  •  
  •  
  •  
  •  

Science

Time : 00:10:00 Hrs
Total Marks : 10

    Part A

    10 x 1 = 10
  1. The speed of light is maximum in

    (a)

    vacuum

    (b)

    glass

    (c)

    diamond

  2. Which of the following statements about total internal reflection is true?

    (a)

    angle of incidence should be greater than critical angle

    (b)

    light must travel from a medium of higher refractive index to a medium of lower refractive index

    (c)

    both (a) and (b)

  3. Mirrors having spherical surface of reflection are __________________

    (a)

    plane mirror

    (b)

    lenses

    (c)

    spherical mirrors

    (d)

    prism

  4. The mirror that diverge the light rays is______________________

    (a)

    concave

    (b)

    convex

    (c)

    plane

    (d)

    None of these

  5. The centre of the reflecting surface of a spherical mirror is _____________________

    (a)

    centre of curvafure

    (b)

    focus

    (c)

    pole

    (d)

    radius of curvature

  6. The radius of curvature of the spherical mirror is equal to __________________

    (a)

    focal length

    (b)

    twice the focal length

    (c)

    thrice the focal length ,:

    (d)

    half of the focal length

  7. To form a real image -________________mirror is required.

    (a)

    parallel

    (b)

    plane

    (c)

    convex

    (d)

    concave

  8. According _______________________to of light, angle of incidence is equal to angle of reflection

    (a)

    refraction

    (b)

    dispersion

    (c)

    reflection

    (d)

    total internal reflection

  9. The mirror used by a dental surgeon, is _______________________

    (a)

    plane

    (b)

    convex

    (c)

    concave and convex

    (d)

    concave

  10. The second law of refraction is stated by ____________________

    (a)

    C.V. Raman

    (b)

    Gallileo

    (c)

    Newton

    (d)

    Snell

*****************************************

Reviews & Comments about 9th Standard Science Light English Medium Free Online Test 1 Mark Questions with Answer Key 2020 - 2021

Write your Comment