An instrument which enables us to see things which are too small to be seen with naked eye is called

  • microscope
  • telescope
  • kaleidoscope
  • periscope

When the speed decreases light bend towards

  • normal ray
  • incident ray
  • reflected ray
  • no ray
How many mirrors are used in Kaleidoscope?
  • 1
  • 2
  • 3
  • 4
Which of the following statements is correct regarding rods and cones in the human eye?
  • Cones are sensitive to dim light
  • Cones are sensitive to bright light.
  • Rods are sensitive to bright light.
  • Rods can sense colour
what is the coloured part of the eye called?
  • pupil
  • Cornea
  • Iris
  • Rods
The angle between incident ray and reflected ray is 90°. What is the value of angle of incidence?
  • 30°
  • 60°
  • 180°
  • 45°
The distance between the object and its image formed by a plane mirror appears to be 48 cm. What is the distance between the mirror and the object?
  • 12cm
  • 24m
  • 36cm
  • 96 cm
The image formed by the plane mirror is
  • Virtual, erect
  • Real , erect
  • Virtual, Inverted
  • Real, inverted
Two mirrors are set right angle as shown below. A ray of light is incident at an angle of 40° . The angle of reflection for the ray reflected from the other mirror will be
light-class8-mcq-1.png
  • 30°
  • 40°
  • 50°
  • 80°
Match the column
light-class8-mcq-2.png
  • p -> iv, q ->i, r -> iii, s -> ii
  • p -> iv, q ->iii, r -> ii, s -> i
  • p -> ii, q ->iii, r -> iv, s -> i
  • p -> iv, q ->iii, r -> i, s -> ii
Part of the eye which controls the light entering is called
  • lens
  • retina
  • iris
  • cornea
The type of lens in Human eye is
  • Convex
  • Concave
  • Mixture
  • Hybrid
Myopia is corrected by using spectacles made of
  • Concave lens
  • Prism
  • Plane glass
  • Convex lens
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