A smooth shining surface, which rebounds the light back in same or in different direction, is called
  • a mirror
  • a lens
  • reflection of light
  • point of incidence
Beam of light striking the reflecting surface is called
  • reflecting ray
  • incident ray
  • refracted ray
  • normal ray
Band of seven colours is called
  • VIBGYOR
  • spectrum
  • dispersion
  • reflection
Front balged part of the eyeball is called
  • cornea
  • choroid
  • pupil
  • retina
Which one 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
In case of reflection of light, the angle of incidence (i) and the angle of reflection (r) are related as
  • i = r
  • i < r
  • i > r
  • no definite relation
Name the type of mirror used as a backview mirror.
  • Plane mirror
  • Concave mirror
  • Convex mirror
  • Any of these
Visually impaired people can read and write using
  • electronic writer
  • digital pens
  • braille system
  • hearing aids
The image formed by a camera and a simple microscope are respectively
  • real and real
  • real and virtual
  • virtual and virtual
  • virtual and real
What is the angle of incidence of a ray if the reflected ray is at an angle of 90° to the incident ray?
  • 60°
  • 45°
  • 90°
  • 180°
The splitting of white light into its seven constituent colours is called
  • refraction
  • dispersion
  • deviation
  • reflection
The defect due to which a person is not able to see the distant objects clearly:
  • Myopia
  • Hypermetropia
  • Cornea
  • Cataract
The amount of light entering the eye is controlled by
  • eye lens
  • cornea
  • iris
  • ciliary muscle
Myopia can be corrected by using a
  • concave lens
  • convex lens
  • opaque lens
  • micro lens
Light enters the eye through
  • eye lens
  • pupil
  • cornea
  • retina

Cyan, yellow and magenta are

  • primary colors
  • white colors
  • secondary colors
  • tertiary colors

To observe traffic while driving we use

  • windscreen
  • rear-view mirror
  • seat belt
  • gear

An instrument which enables us to see objects which are not in our direct line of sight is called

  • microscope
  • telescope
  • kaleidoscope
  • periscope

A snail crawls at the speed of

  • 1.7 m/s
  • 0.03 m /s
  • 25m/s
  • 10m/s

The partial shadow is called

  • umbra
  • penumbra
  • screen
  • source

An instrument which enables us to see distant objects clearly is

  • microscope
  • telescope
  • kaleidoscope
  • periscope

The band of colored light which make up white light is called

  • spectrum of light
  • band of light
  • rainbow
  • white light colors

The primary colors of light includes

  • red
  • green
  • blue
  • all of them

The beam of light can be

  • straight
  • divergent
  • convergent
  • all of them

Glass, tracing paper are

  • transparent
  • translucent
  • opaque
  • semi-absorbent

The ray which is striking the surface is

  • normal ray
  • incident ray
  • reflected ray
  • all of them

Mirror which have inner surface like a sphere is called

  • convex mirror
  • concave mirror
  • plane mirror
  • cosmetic mirror

The part of human eye which is sensitive to red, blue and green light is

  • retina
  • lens
  • cornea
  • vision

A beam of light is made up of bundle of

  • rays
  • droplets
  • clusters
  • groups

The bending of light sometimes give us wrong impression of

  • depths
  • heights
  • volume
  • shape
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