If we can see through an object then it is
  • Translucent
  • Opaque
  • Transparent
  • None Of These
We cannot see at night without a torch or a bulb - True/False
  • True
  • False
Which of these is non-luminous?
  • Sun
  • Candle
  • Bulb
  • Moon
QLight travels in a _________ line.
  • curved
  • straight
Light travels from the sun to the earth in ____ minutes.
  • 6 ½
  • 8 ¼
__________ fuels are the remains of plants and animals that have been changed by nature over millions of years.
  • Fossil
  • plant
Light travels about ___________ km per second in air.
  • 8,00,000
  • 3,00,000
The distance from the sun to the earth is ____ lakh kilometres.
  • 1845
  • 1485
The objects that produce their own light are called ______ objects.
  • luminous
  • non-luminous
Moon is a ___________object.
  • luminous
  • non-luminous
. The property of light travelling in straight line is called _________ propagation of light.
  • rectilinear
  • curvilinear
A __________of light is broader and consists of several rays
  • ray
  • beam
Objects that do not allow light to pass through them are called ________ objects.
  • opaque
  • transparent
During ______eclipse, shadow of the moon falls on some portions of the earth.
  • Lunar
  • solar
The _________of the shadow depend on the shape of the object and the position of the source of light,
  • shape
  • colour
Non-luminous objects are objects which:
  • A) Produce their own light
  • B)Do not produce its own light
  • C) Can be seen only when light falls o them 
  • D) Both (B) and (C)
A transparent object which is mostly used in windows of houses.
  • A) polythene
  • B) Wood
  • C) Glass
  • D) Ground glass
Which of the following characteristics are observed in an image formed by a pinhole camera?
  • A) Virtual image
  • B) Real image
  • C) Erect Image
  • D) Image of different colour
Which of the flowing is a transparent object?
  • A) Cardboard
  • B)Tracing paper
  • C) Air
  • D) Clear glass
Light travels in a:
  • A) Circular path
  • B) Rectilinear path
  • C) Rotational path
  • D) Triangular path
Which of the following is not a necessary condition for the formation of ashadow?
  • A) An opaque object
  • B) A screen
  • C) A transparent object
  • D) A source of light
Images of actors on screen in cinema halls are;
  • A) Virtual images
  • B) Real images
  • C) Imaginary images
  • D) All the above
We can see any object if:
  • A) It is a luminous object.
  • B) It reflects the light falling on it.
  • C) It is placed in a dark room.
  • D) Both [a] and [b]
Opaque objects:
  • A) Allow light to pass through them.
  • B) Allow light to pass through them partially.
  • C) Allow light not to pass through them.
  • D) Both [b] and [c]
A very narrow beam of light is called:
  • A) Ray
  • B) Beam
  • C) Candela
  • D) All the above
Which of the following images are real?
  • A) Image formed on the screen of cinema hall.
  • B) Image formed by a pinhole camera.
  • C) Image formed by a concave mirror when object is placed at infinity.
  • D) All the above
Narrow beam of light before reflection in known as:
  • A) Reflected ray
  • B) Incident ray
  • C) Normal ray
  • D) Reflection
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