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CBSE · Class 7 · Science

Light: Shadows and Reflections

Standard difficulty · 20 questions · 40 marks

Name: Date: Score: ____ / 40

Show your working for Sections B and C. Answers are on the last page — try every question first!

Section A — Choose the correct answer8 × 1 = 8 marks
1.
Objects that give out their own light are called:
  1. opaque
  2. translucent
  3. non-luminous
  4. luminous
2.
Which of these is LUMINOUS?
  1. a burning candle
  2. the planet Venus
  3. a wall
  4. a polished steel plate
3.
Which of these is NON-LUMINOUS?
  1. a glowing bulb
  2. a star
  3. the Sun
  4. a mirror
4.
Which capital letter looks the SAME in a plane mirror?
  1. K
  2. B
  3. V
  4. P
5.
Frosted glass is:
  1. transparent
  2. opaque
  3. luminous
  4. translucent
6.
At one time of day, a 1 m stick casts a 6 m shadow. At the same time, how long is the shadow of a 6 m pole? (Shadows are in the same ratio as heights at the same time.)
  1. 36 m
  2. 42 m
  3. 12 m
  4. 6 m
7.
Light travels about 3 lakh (300,000) km every second. About how far does it travel in 6 seconds?
  1. 18,000,000 km
  2. 300,006 km
  3. 1,800,000 km
  4. 180,000 km
8.
You stand 12 m in front of a plane mirror. How far is your image from you?
  1. 14 m
  2. 24 m
  3. 12 m
  4. 48 m
Section B — Short answer8 × 2 = 16 marks
9.
What three things are needed to form a shadow?
10.
Write "luminous" or "non-luminous": (a) the Moon (b) a polished steel plate
11.
Does the capital letter look the same in a plane mirror? Write "yes" or "no": (a) J (b) F
12.
Is it "transparent", "translucent" or "opaque"? (a) clear water (b) oiled paper
13.
Is a pole's shadow "long" or "short" at (a) 12:30 p.m. (b) 6 p.m.?
14.
At 4 p.m., a 5 m pole has a 15 m shadow. How long is the shadow of a 14 m tree at the same time?
15.
A girl stands 6 m from a plane mirror and walks 4 m closer. How far is her image from her now?
16.
How is light used in (a) shadow puppetry (b) an ambulance?
Section C — Word problems4 × 4 = 16 marks
17.
Describe an activity to show that light travels in a straight line.
18.
A 3 m stick's shadow was measured at 9 a.m., noon and 4 p.m.: 15 m, 1 m and 12 m. (a) When was it shortest, and why? (b) In which direction would the shadow point in the morning? (c) How much shorter was it at noon than at 9 a.m.?
19.
The word AMBULANCE is held up to a plane mirror. (a) Will it read the same in the mirror? (b) Name the effect. (c) Write two other properties of an image in a plane mirror.
20.
A torch shines on a glass sheet, a wooden board, clear water in turn, in front of a wall. (a) Describe the shadow of each. (b) What happens to a shadow as the object is moved nearer the torch? (c) What three things are needed for a shadow?
AmbifulWorksheets
Practice that never repeats
CBSE · Class 7 · Science

Answer key

Light: Shadows and Reflections · AW-7S-LSR-2026-V1 · For parents — fold back or tear off before handing the sheet to your child.

QAnswerWorking
1(d) luminous—
2(a) a burning candle—
3(d) a mirror—
4(c) V—
5(d) translucent—
6(a) 36 m6 × 6 = 36
7(c) 1,800,000 km300,000 × 6 = 1,800,000
8(b) 24 m12 + 12 = 24 (the image is as far behind the mirror as you are in front)
9A source of light, an opaque object and a screen.—
10(a) non-luminous (b) non-luminous—
11(a) no (b) no—
12(a) transparent (b) translucent—
13(a) short (b) long—
1442 meach metre of height gives 3 m of shadow: 14 × 3
154 mshe is 2 m from the mirror; the image is as far behind: 2 × 2
16(a) opaque puppets block light to form shapes on a screen (b) its name is written laterally inverted for mirrors—
17Make holes in three cardboard pieces at the same height and line them up so a candle can be seen through all three. Move one card slightly to the side: the candle can no longer be seen, showing light travels in straight lines.—
18(a) At noon, when the Sun is highest. (b) Towards the west (away from the morning Sun in the east). (c) 14 m—
19(a) No: the order of the letters is reversed and some letters are flipped (b) Lateral inversion (c) It is erect and the same size as the object (and as far behind the mirror as the object is in front).—
20(a) a glass sheet: little or no shadow; a wooden board: a dark shadow; clear water: little or no shadow (b) It becomes larger. (c) A light source, an opaque (or translucent) object and a screen.—