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Light and Shadows — Homi Bhabha Class 6 Physics MCQs with Solutions
Free Homi Bhabha Class 6 Physics Light and Shadows MCQs with step-by-step solutions covering Luminous & Non-luminous Objects, Transparent, Translucent & Opaque, Rectilinear Propagation & Pinhole Camera, Shadows & Eclipses. Practise online on Prepizo — no login needed.
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Subtopics
Sample questions with solutions
Q1 — Luminous & Non-luminous Objects · easy · theory
Which of the following is a luminous object?
A. A wooden table
B. A mirror
C. The Sun ✓ Correct
D. The Moon
Solution: A luminous object gives out its own light. The Sun makes its own light. The Moon, a table and a mirror only reflect light that falls on them.
Q2 — Luminous & Non-luminous Objects · easy · theory
A non-luminous object is one that:
A. is always hot
B. does not give out its own light ✓ Correct
C. is always shiny
D. gives out its own light
Solution: Non-luminous objects do not produce their own light. We see them only because they reflect light coming from a luminous source.
Q3 — Luminous & Non-luminous Objects · easy · theory
Which of these is a non-luminous object?
A. The Sun
B. The Moon ✓ Correct
C. A burning candle
D. A glowing electric bulb
Solution: The Moon does not make its own light; it shines by reflecting sunlight. A candle flame, a glowing bulb and the Sun all give out their own light.
Q4 — Luminous & Non-luminous Objects · easy · theory
Objects that give out their own light are called:
A. transparent objects
B. non-luminous objects
C. luminous objects ✓ Correct
D. opaque objects
Solution: Objects that produce their own light, such as the Sun, a flame or a lit bulb, are called luminous objects.
Q5 — Transparent, Translucent & Opaque · easy · theory
An object through which you can see clearly is called:
A. transparent ✓ Correct
B. opaque
C. translucent
D. luminous
Solution: Transparent objects let almost all light pass straight through, so you can see clearly through them, like clear glass.
Q6 — Transparent, Translucent & Opaque · easy · theory
Which of these is a transparent object?
A. A brick wall
B. A metal sheet
C. A wooden door
D. A clear glass window ✓ Correct
Solution: A clear glass window lets light pass through and you can see through it, so it is transparent. The others block light and are opaque.
Q7 — Transparent, Translucent & Opaque · easy · theory
An object that does not allow any light to pass through it is called:
A. transparent
B. shiny
C. opaque ✓ Correct
D. translucent
Solution: Opaque objects block light completely, so you cannot see through them at all, like a wall or a wooden board.
Q8 — Transparent, Translucent & Opaque · easy · theory
Which of these is an opaque object?
A. Clear water
B. A wooden board ✓ Correct
C. A glass tumbler
D. A sheet of cellophane
Solution: A wooden board stops light completely, so it is opaque. Clear water, a glass tumbler and cellophane let light through.
Q9 — Rectilinear Propagation & Pinhole Camera · easy · theory
Light travels in a:
A. straight line ✓ Correct
B. circle
C. zig-zag path
D. curved path
Solution: In a clear medium, light always travels in straight lines. This is why we get sharp shadows and can use a pinhole camera.
Q10 — Rectilinear Propagation & Pinhole Camera · easy · theory
The travelling of light in a straight line is called:
A. refraction of light
B. reflection of light
C. rectilinear propagation of light ✓ Correct
D. rotation of light
Solution: Rectilinear propagation means light moves in straight lines. "Rectilinear" simply means "in a straight line".
Q11 — Rectilinear Propagation & Pinhole Camera · easy · theory
A pinhole camera works because light:
A. does not move at all
B. travels in straight lines ✓ Correct
C. travels in curves
D. gives out its own light
Solution: Light from the object passes straight through the tiny hole in straight lines and forms an image on the screen at the back.
Q12 — Rectilinear Propagation & Pinhole Camera · easy · theory
The image formed on the screen of a pinhole camera is:
A. with no shape at all
B. always coloured red
C. upside down (inverted) ✓ Correct
D. upright and same size
Solution: Rays from the top and bottom of the object cross at the tiny hole, so the image formed on the screen is upside down (inverted).
Q13 — Shadows & Eclipses · easy · theory
A shadow is formed when an opaque object blocks:
A. sound
B. light ✓ Correct
C. air
D. water
Solution: A shadow is the dark area formed when an opaque object comes in the path of light and stops it from passing.
Q14 — Shadows & Eclipses · easy · theory
Which three things are needed to form a shadow?
A. A mirror and some water
B. A source of light, an opaque object, and a screen (surface) ✓ Correct
C. Only complete darkness
D. Only an opaque object
Solution: To get a shadow you need light, an opaque object to block that light, and a surface (screen) on which the dark shadow falls.
Q15 — Shadows & Eclipses · easy · theory
The colour of a shadow is always:
A. the same colour as the object
B. white
C. red
D. dark (black) ✓ Correct
Solution: A shadow shows only where light is blocked, not the object colour, so it always looks dark (black), whatever colour the object is.
Q16 — Shadows & Eclipses · easy · theory
A shadow is always formed on the side of the object that is:
A. inside the object
B. away from the light (opposite side) ✓ Correct
C. right above the object
D. facing the light
Solution: Light is blocked by the object, so the shadow falls on the side opposite to the light source, away from the light.
Q17 — Luminous & Non-luminous Objects · hard · theory
A polished steel spoon shines brightly in sunlight. Is the spoon luminous or non-luminous?
A. Luminous, because it is made of metal
B. Luminous, because it shines
C. Non-luminous, because it only reflects light ✓ Correct
D. Non-luminous, because it feels cold
Solution: Shining is not the same as making light. The spoon has no light of its own; it only reflects sunlight, so it is non-luminous.
Q18 — Luminous & Non-luminous Objects · hard · theory
In a room that is completely dark with no light source, you cannot see a red apple on the table. Why?
A. The apple is luminous only in daytime
B. The apple stops existing in the dark
C. The apple turns black in the dark
D. There is no light for the apple to reflect into your eyes ✓ Correct
Solution: The apple is non-luminous, so it can only be seen by reflecting light. With no light in the room, nothing reflects to your eyes, so you cannot see it.
Q19 — Transparent, Translucent & Opaque · hard · theory
Which object would cast the darkest, sharpest shadow, because it blocks light completely?
A. Clear glass
B. Oiled paper
C. A wooden plank ✓ Correct
D. Frosted glass
Solution: A dark, sharp shadow needs an opaque object that stops all the light. A wooden plank is opaque; the others let some light through and give faint shadows.
Q20 — Transparent, Translucent & Opaque · hard · theory
When a few drops of oil fall on ordinary paper, that spot becomes more see-through and lets more light pass. That oily spot:
A. becomes more transparent ✓ Correct
B. starts giving out its own light
C. turns into a mirror
D. becomes more opaque
Solution: The oil fills the tiny gaps in the paper so more light can pass straight through. The spot lets light through better, becoming more transparent.
Q21 — Rectilinear Propagation & Pinhole Camera · hard · theory
In a pinhole camera, why does an upright tree form an upside-down image on the screen?
A. The light bends sharply at the hole
B. The screen flips the picture over
C. The camera slowly spins around
D. Light rays from the top and bottom travel straight and cross at the hole ✓ Correct
Solution: Light from the top of the tree goes straight down to the bottom of the screen, and light from the bottom goes to the top. The straight rays cross at the hole, giving an inverted image.
Q22 — Rectilinear Propagation & Pinhole Camera · hard · theory
In a pinhole camera, the screen is moved farther away from the hole (the box is made longer). The image on the screen becomes:
A. upright
B. smaller
C. completely dark at once
D. larger ✓ Correct
Solution: A longer distance between the hole and the screen lets the straight rays spread out more before landing, so the image is larger (though a bit dimmer).
Q23 — Shadows & Eclipses · hard · theory
A lunar eclipse happens when the Earth’s shadow falls on the Moon. For this, the three must lie in a line in the order:
A. Moon – Earth – Sun with the Moon in the middle
B. Sun – Moon – Earth with the Moon in the middle
C. Sun – Earth – Moon with the Earth in the middle ✓ Correct
D. Earth – Sun – Moon with the Sun in the middle
Solution: For a lunar eclipse the Earth must be between the Sun and the Moon (Sun – Earth – Moon), so the Earth’s shadow falls on the Moon.
Q24 — Shadows & Eclipses · hard · theory
A boy stands between a lamp and a wall. If he moves closer to the lamp, his shadow on the wall becomes:
A. larger ✓ Correct
B. smaller
C. exactly the same size
D. brightly coloured
Solution: Moving nearer the lamp, the boy blocks the spreading light closer to the source, so his shadow spreads out more on the wall and looks larger.
Q25 — Luminous & Non-luminous Objects · medium · theory
The Moon appears bright in the night sky because it:
A. is a burning star
B. is very hot
C. makes its own light
D. reflects light from the Sun ✓ Correct
Solution: The Moon is non-luminous. It looks bright only because it reflects the sunlight that falls on it towards the Earth.
Q26 — Luminous & Non-luminous Objects · medium · theory
Which group contains only luminous objects?
A. Sun, Moon, star
B. Moon, mirror, book
C. candle flame, wall, chair
D. Sun, star, glowing bulb ✓ Correct
Solution: The Sun, a star and a glowing bulb all produce their own light. The other groups include non-luminous things like the Moon, a mirror, a book, a wall and a chair.
Q27 — Luminous & Non-luminous Objects · medium · theory
We are able to see a non-luminous object such as a chair only when:
A. it becomes very hot
B. it is completely dark
C. light falls on it and reflects into our eyes ✓ Correct
D. it starts glowing on its own
Solution: A chair has no light of its own. Light from a source falls on it, bounces off, and enters our eyes, letting us see it.
Q28 — Luminous & Non-luminous Objects · medium · theory
Which of these is a luminous object?
A. A steel plate
B. A firefly ✓ Correct
C. A wooden log
D. A pebble
Solution: A firefly is a living thing that produces its own light, so it is luminous. A log, a plate and a pebble only reflect light.
Q29 — Transparent, Translucent & Opaque · medium · theory
Butter paper and frosted glass let some light through but you cannot see clearly through them. They are:
A. opaque
B. transparent
C. luminous
D. translucent ✓ Correct
Solution: Translucent objects let only some light pass and scatter it, so you see a blurry, unclear view through them.
Q30 — Transparent, Translucent & Opaque · medium · theory
Which pair correctly matches the object with its type?
A. Wooden door – transparent
B. Clear glass – opaque
C. Tracing paper – translucent ✓ Correct
D. Brick wall – transparent
Solution: Tracing paper lets some light through but blurs the view, so it is translucent. Clear glass is transparent, while a wooden door and a brick wall are opaque.