Light helps us see the world around us. It also creates fascinating effects like shadows, reflections, and images. This chapter explains how light travels, how shadows form, and how mirrors and pinhole cameras create images. Solve these MCQs to test your understanding of light, shadows, and reflections in everyday life.
MCQ Questions for Class 7 Science Chapter 11 Light: Shadows and Reflections with Answers
Question 1: Which of the following is a luminous object?
a) Moon
b) Sun
c) Earth
d) Mirror
Answer:
b) Sun — The Sun is a natural source of light, hence a luminous object.
Question 2: Which of the following does not produce its own light?
a) Candle
b) Stars
c) Moon
d) Electric bulb
Answer:
c) Moon — The Moon reflects sunlight and does not produce its own light.
Question 3: Which type of objects allow light to pass through completely?
a) Transparent
b) Translucent
c) Opaque
d) Luminous
Answer:
a) Transparent — Transparent objects allow all light to pass through.
Question 4: What type of objects form shadows?
a) Transparent
b) Opaque
c) Translucent
d) None
Answer:
b) Opaque — Opaque objects block light and form shadows.
Question 5: Which of the following is a translucent object?
a) Clear glass
b) Butter paper
c) Wooden door
d) Steel plate
Answer:
b) Butter paper — Butter paper allows partial light to pass through.
Question 6: The dark region of a shadow where no light falls is called?
a) Penumbra
b) Umbra
c) Reflection
d) Mirage
Answer:
b) Umbra — Umbra is the darkest part of a shadow.
Question 7: The lighter region around the shadow is known as?
a) Umbra
b) Penumbra
c) Mirage
d) Image
Answer:
b) Penumbra — Penumbra is the partially shaded region of a shadow.
Question 8: Which of the following is necessary for the formation of shadows?
a) Light source
b) Opaque object
c) Screen
d) All of these
Answer:
d) All of these — A light source, opaque object, and screen are necessary.
Question 9: A pinhole camera works on the principle of?
a) Diffusion of light
b) Rectilinear propagation of light
c) Reflection of light
d) Refraction of light
Answer:
b) Rectilinear propagation of light — Light travels in straight lines.
Question 10: The image formed by a pinhole camera is?
a) Erect and diminished
b) Inverted and real
c) Virtual and erect
d) Enlarged and real
Answer:
b) Inverted and real — The pinhole camera forms real and inverted images.
Question 11: Which type of mirror always forms virtual, erect, and diminished images?
a) Plane mirror
b) Concave mirror
c) Convex mirror
d) None of these
Answer:
c) Convex mirror — Convex mirrors form virtual, erect, and diminished images.
Question 12: A plane mirror forms an image that is?
a) Real and inverted
b) Virtual and erect
c) Enlarged and real
d) None of these
Answer:
b) Virtual and erect — Plane mirrors always form virtual, erect images.
Question 13: The left-hand appears as the right-hand in a mirror. This is called?
a) Inversion
b) Reflection
c) Lateral inversion
d) Refraction
Answer:
c) Lateral inversion — Plane mirrors show lateral inversion.
Question 14: The bouncing back of light from a surface is called?
a) Refraction
b) Absorption
c) Reflection
d) Transmission
Answer:
c) Reflection — Reflection is the bouncing back of light.
Question 15: Which of the following surfaces is the best reflector of light?
a) Rough wall
b) Polished mirror
c) Wooden board
d) Paper
Answer:
b) Polished mirror — Smooth polished surfaces reflect light better.
Question 16: The reflection from a rough surface is called?
a) Regular reflection
b) Diffused reflection
c) Multiple reflection
d) Total reflection
Answer:
b) Diffused reflection — Rough surfaces cause diffused reflection.
Question 17: A periscope works on the principle of?
a) Refraction
b) Total internal reflection
c) Multiple reflection
d) Dispersion
Answer:
c) Multiple reflection — Periscopes use multiple reflections.
Question 18: Which mirror is used as a rear-view mirror in vehicles?
a) Concave mirror
b) Plane mirror
c) Convex mirror
d) None
Answer:
c) Convex mirror — Convex mirrors give a wider field of view.
Question 19: The path along which light travels is called?
a) Beam
b) Ray
c) Wave
d) Current
Answer:
b) Ray — A ray is the path along which light travels.
Question 20: Which of these is NOT an optical instrument?
a) Microscope
b) Telescope
c) Periscope
d) Thermometer
Answer:
d) Thermometer — It measures temperature, not light.
Question 21: The moon is visible because of?
a) Its own light
b) Reflected sunlight
c) Stars’ light
d) Heat emission
Answer:
b) Reflected sunlight — The moon shines by reflecting sunlight.
Question 22: Light travels fastest in?
a) Air
b) Water
c) Glass
d) Vacuum
Answer:
d) Vacuum — Light travels fastest in a vacuum.
Question 23: The size of a shadow depends on?
a) Distance of source and object
b) Distance of object and screen
c) Both (a) and (b)
d) Shape of the object only
Answer:
c) Both (a) and (b) — Shadow size depends on distances involved.
Question 24: A solar eclipse occurs when?
a) Earth comes between Sun and Moon
b) Moon comes between Sun and Earth
c) Sun comes between Earth and Moon
d) None of these
Answer:
b) Moon comes between Sun and Earth — This blocks sunlight on Earth.
Question 25: A lunar eclipse occurs when?
a) Earth comes between Sun and Moon
b) Moon comes between Sun and Earth
c) Sun comes between Earth and Moon
d) None
Answer:
a) Earth comes between Sun and Moon — The Earth’s shadow falls on the Moon.
Question 26: A convex mirror is also called?
a) Converging mirror
b) Diverging mirror
c) Cylindrical mirror
d) Plane mirror
Answer:
b) Diverging mirror — Convex mirrors diverge light rays.
Question 27: Which device uses multiple reflections inside to light up?
a) Microscope
b) Kaleidoscope
c) Telescope
d) Periscope
Answer:
b) Kaleidoscope — It uses mirrors for multiple reflections.
Question 28: Shadows are formed due to?
a) Diffraction of light
b) Rectilinear propagation of light
c) Reflection of light
d) Refraction of light
Answer:
b) Rectilinear propagation of light — Shadows prove light travels in straight lines.
Question 29: A pinhole camera forms an image which is always?
a) Real and inverted
b) Virtual and erect
c) Enlarged and inverted
d) None
Answer:
a) Real and inverted — The pinhole camera forms real inverted images.
Question 30: Reflection of light from a smooth surface is called?
a) Diffused reflection
b) Regular reflection
c) Multiple reflection
d) Scattering
Answer:
b) Regular reflection — It occurs on smooth polished surfaces.
Question 31: Which mirror is used by dentists to see large images of teeth?
a) Plane mirror
b) Convex mirror
c) Concave mirror
d) None
Answer:
c) Concave mirror — It forms enlarged images of close objects.
Question 32: The image formed by a plane mirror is of the same?
a) Size
b) Shape
c) Distance
d) All of these
Answer:
d) All of these — The plane mirror forms same size, shape, and equidistant image.
Question 33: Light travels in?
a) Zig-zag lines
b) Curved lines
c) Straight lines
d) Circular paths
Answer:
c) Straight lines — Light always travels in straight lines.
Question 34: When light falls on a mirror, it?
a) Passes through
b) Gets absorbed
c) Gets reflected
d) Disappears
Answer:
c) Gets reflected — Mirrors reflect most of the light falling on them.
Question 35: Which of the following cannot be seen in a plane mirror?
a) Our face
b) Our back
c) A candle flame
d) Book cover
Answer:
b) Our back — A plane mirror cannot show our back directly.
Question 36: Which eclipse is more commonly observed from Earth?
a) Solar eclipse
b) Lunar eclipse
c) Both equally
d) None
Answer:
b) Lunar eclipse — Lunar eclipses are more widely visible than solar ones.
Fill in the Blanks Questions for Class 7 Science Chapter 11 Light: Shadows and Reflections
1. Light travels in a straight line, which is called the law of ___ of light.
Answer:
Rectilinear propagation
2. Objects which emit their own light are called ___ objects.
Answer:
Luminous
3. The Moon shines because it ___ the light of the Sun.
Answer:
Reflects
4. Objects through which no light can pass are called ___ objects.
Answer:
Opaque
5. A shadow is formed on a ___ when light is blocked by an object.
Answer:
Screen
6. The dark central part of a shadow is called ___.
Answer:
Umbra
7. The lighter outer region of a shadow is called ___.
Answer:
Penumbra
8. A pinhole camera forms an image that is inverted and ___.
Answer:
Real
9. The image formed by a plane mirror is always ___ and erect.
Answer:
Virtual
10. The phenomenon in which the left appears as right in a mirror is called ___ inversion.
Answer:
Lateral
11. Reflection of light from a smooth surface is called ___ reflection.
Answer:
Regular
12. Reflection of light from a rough surface is called ___ reflection.
Answer:
Diffused
13. A ___ mirror is used as a rear-view mirror in vehicles.
Answer:
Convex
14. The bouncing back of light from a surface is known as ___.
Answer:
Reflection
15. During a solar eclipse, the ___ comes between the Sun and the Earth.
Answer:
Moon
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