Q.1
If a man’s face iscm in front of concave shaving mirror producing erect image 1.5 times the size of face, focal length of the mirror would be:
  • 75 cm
  • 25 cm
  • 15 cm
  • 60 cm
Q.2
A student is 2.away from a convex lens while her image is 1.from the lens, what is the focal length?
  • 1.05m
  • 2.50m
  • 1.39m
  • 0.72m
Q.3
You are given three media A, B and C of refractive index 1.1.and 1.The medium in which the light will travel fastest is
  • A
  • B
  • C
  • Equal in all media
Q.4
If the power of a lens is – 2 D, what is its focal length?
  • +50 cm
  • -100 cm
  • -50 cm
  • +100 cm
Q.5
What does The law of reflection state?
  • the angle the incident ray makes with a line drawn perpendicular to the surface of the mirror.
  • shows how rays change direction when they strike mirrors and pass through lenses.
  • The angle of reflection is equal to the angle of incidence.
Q.6
What colour is best to be seen in the dark?
  • yellow
  • black
  • grey
  • bright green
  • silver
Q.7
What is reflective in our classroom?
  • lights
  • a book bag
  • computer
  • Mrs Gaunt
Q.8
Is a tree reflective?
  • yes
  • no
  • sometimes
Q.9
What does translucent mean?
  • Light can pass through it
  • No light can pass through it
  • some light can pass through it
Q.10
What does transparent mean?
  • Light can pass through it
  • No light can pass through it
  • some light can pass through it
Q.11
What does opaque mean?
  • Light can pass through it
  • No light can pass through it
  • some light can pass through it
Q.12
What happens if the light hits a smooth surface?
  • It scatters
  • It bounces back
  • It is absorbed
Q.13
Where does light come from?
  • sun
  • light bulb
  • curtains
  • windows
  • fire
Q.14
What do you use to see?
  • nose
  • eyes
  • tongue
  • hands
Q.15
According to the laws of reflection, if i = angle of incidence and r = angle of reflection,
  • A. i =  r
  • B. i >  r
  • C. r >  i
  • D. i is not equal to r
Q.16
Law of Reflection states that the incident angle is ____ the reflected angle
  • greater than
  • less than
  • equal to
Q.17
The two types of spherical mirrors are ...............
  • flat and plane
  • concave and plane
  • convex and concave
  • plane and rectangular
Q.18
In a concave mirror, if an incident ray passes through F and hits the mirror then it will reflect
  • Towards C
  • Towards F
  • Parallel
  • Away from the mirror
Q.19
An image that forms when light rays actually meet
  • virtual image
  • real image
  • diffuse reflection
  • regular reflection
Q.20
The phenomenon by which the incident light falling on a surface is sent back into the same medium is known as ________.
  • polarization
  • reflection
  • refraction
  • absorption
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