The following 20 Multiple Choice Questions (MCQ) are based on
Chapter 11: Light: Shadows and Reflections from the NCERT Class 7
Science textbook Curiosity. Each question has four options - select the
best answer and click to check.
Instructions: Read each question carefully. Choose the most
appropriate option from (a), (b), (c), or (d). Click
Show Answer to reveal the correct answer with explanation.
Multiple Choice Questions
1An object that emits its own light is:
(a) Luminous
(b) Opaque
(c) Transparent
(d) A shadow
(a) is correct
Luminous objects are sources of light.
2Which is a luminous object?
(a) The Moon
(b) A book
(c) A mirror
(d) The Sun
(d) is correct
The Sun produces its own light.
3The Moon is visible because it:
(a) Is transparent
(b) Creates electricity
(c) Reflects sunlight
(d) Produces its own light
(c) is correct
The Moon is non-luminous and sends reflected sunlight toward us.
4Light travels through a uniform medium in:
(a) No definite path
(b) Straight lines
(c) Random loops
(d) Only circles
(b) is correct
The formation of sharp shadows and pinhole images supports rectilinear propagation.
5A transparent material allows:
(a) Most light to pass through
(b) No light through
(c) Only shadows through
(d) Light only after heating
(a) is correct
Clear glass is an example through which objects can be seen distinctly.
6A translucent material allows:
(a) All light with perfect clarity
(b) No light
(c) Only reflected sound
(d) Some light through but not a clear view
(d) is correct
Frosted glass and tracing paper scatter transmitted light.
7An opaque object:
(a) Must emit light
(b) Cannot form a shadow
(c) Does not allow light to pass through
(d) Transmits all light
(c) is correct
Opaque materials block light and can cast shadows.
8A shadow requires:
(a) No light source
(b) A light source, an opaque object and a screen
(c) Only a mirror
(d) A transparent object only
(b) is correct
The object blocks part of the light before it reaches a surface.
9The colour of a shadow is generally:
(a) Dark regardless of the object's colour
(b) Always the object's colour
(c) Always white
(d) Always red
(a) is correct
A shadow is a region receiving less light, not an image of surface colour.
10A shadow becomes larger when the object moves:
(a) Closer to the screen with source far away
(b) Behind the screen
(c) Out of the light path
(d) Closer to the light source
(d) is correct
A nearby source makes the object block a wider cone of diverging light.
11Reflection is the:
(a) Production of sound
(b) Passage of light through every object
(c) Bouncing back of light from a surface
(d) Absorption of all light
(c) is correct
A reflecting surface redirects incident light back into the same medium.
12A smooth polished surface produces mostly:
(a) A shadow without light
(b) Regular reflection
(c) No reflection
(d) Only absorption
(b) is correct
Nearly parallel rays remain orderly after reflecting from a smooth surface.
13We can see a rough wall because it produces:
(a) Diffuse reflection
(b) No reflection
(c) Only regular reflection in one direction
(d) Its own light
(a) is correct
Scattered reflected light reaches observers in many directions.
14An image in a plane mirror is:
(a) Inverted and real
(b) Always enlarged
(c) Obtained on a screen
(d) Erect and virtual
(d) is correct
Reflected rays appear to come from behind the mirror.
15A plane mirror forms an image that is:
(a) Always larger
(b) Colourless
(c) The same size as the object
(d) Always smaller
(c) is correct
Magnification of a plane mirror is one.
16The image distance behind a plane mirror equals:
(a) The mirror's height
(b) The object distance in front
(c) Twice the object distance
(d) Zero
(b) is correct
The image appears symmetrically located behind the mirror.
17Lateral inversion means that a plane mirror appears to interchange:
(a) Left and right
(b) Top and bottom
(c) Near and far only
(d) Light and dark
(a) is correct
Writing appears reversed sideways in a plane mirror.
18A pinhole camera forms an image that is generally:
(a) Erect in every case
(b) Virtual only
(c) Larger in every setup
(d) Inverted
(d) is correct
Straight-line rays from different object points cross at the pinhole.
19A periscope uses plane mirrors to:
(a) Measure speed
(b) Make heat
(c) See over or around obstacles
(d) Produce electricity
(c) is correct
Successive reflections redirect light to the observer.
20A kaleidoscope creates patterns by:
(a) Producing sound waves
(b) Multiple reflections between mirrors
(c) Absorbing all light
(d) Using only one opaque screen
(b) is correct
Repeated mirror images of coloured pieces form changing symmetrical designs.
