7 class FA 4 EXAM ANSWER KEY FEBRUARY 2026
SECTION – A : Multiple Choice Questions
1. Identify the following mirror shown in the figure.
A) Convex mirror
B) Concave mirror
C) Convex lens
D) Concave lens
Answer: B) Concave mirror
A) Vehicles to see the side view
B) Spectacles
C) Telescopes
D) Microscopes
Answer: A) Vehicles to see the side view
A) X = Red, Y = Orange
B) X = Blue, Y = Yellow
C) X = Red, Y = Violet
D) X = Violet, Y = Red
Answer: C) X = Red, Y = Violet
A) Red
B) Green
C) Blue
D) Black
Answer: D) Black
A) Reflection of light from the surface of a CD
B) Reflection of light from a plane mirror
C) Formation of a rainbow
D) Light passing through a prism
Answer: B) Reflection of light from a plane mirror
A) Image distance
B) Size of image
C) Shape of image
D) Lateral inversion
Answer: D) Lateral inversion
A) It diverges the rays
B) It converges the rays to a single point
C) It reflects the rays back
D) It scatters the rays randomly
Answer: B) It converges the rays to a single point
A) Light can travel around corners
B) Light needs a medium to travel
C) Light is a form of energy
D) Light travels in a straight line
Answer: D) Light travels in a straight line
A) Real and inverted
B) Virtual and inverted
C) Virtual and erect
D) Real and enlarged
Answer: C) Virtual and erect
A) Red
B) Green
C) Blue
D) White
Answer: D) White
A) It always forms real images
B) It always forms inverted images
C) It splits white light into colours
D) It forms a magnified image when very close to the object
Answer: D) It forms a magnified image when very close to the object
SECTION – A : Multiple Choice Questions
1. Identify the following mirror shown in the figure.
B) Concave mirror
C) Convex lens
D) Concave lens
Answer: B) Concave mirror
2. Lenses are not used in __________.
A) Vehicles to see the side view
B) Spectacles
C) Telescopes
D) Microscopes
Answer: A) Vehicles to see the side view
3. David is observing his image in a plane mirror. The distance between the mirror and his image is 4 m. If he moves 1 m towards the mirror, the distance between David and his image will be:
A) 3 m
B) 5 m
C) 6 m
D) 8 m
Answer: C) 6 m
A) 3 m
B) 5 m
C) 6 m
D) 8 m
Answer: C) 6 m
4. Guess the colours labelled as X and Y in the given prism diagram.
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B) X = Blue, Y = Yellow
C) X = Red, Y = Violet
D) X = Violet, Y = Red
Answer: C) X = Red, Y = Violet
5. Which of the following colours cannot be seen in a rainbow?
A) Red
B) Green
C) Blue
D) Black
Answer: D) Black
6. In which of the following cases does white light not split into seven colours?
A) Reflection of light from the surface of a CD
B) Reflection of light from a plane mirror
C) Formation of a rainbow
D) Light passing through a prism
Answer: B) Reflection of light from a plane mirror
7. Bhaskar observed his image on the shiny surface of the bell of his bicycle. What kind of image did he see?
A) Real and inverted
B) Magnified and inverted
C) Small and erect
D) Real and enlarged
Answer: C) Small and erect
A) Mirror
B) Lens
C) Still Water
D) Polished wood
Answer: B) Lens
A) Real and inverted
B) Magnified and inverted
C) Small and erect
D) Real and enlarged
Answer: C) Small and erect
8. Which of the following surfaces does not reflect light?
A) Mirror
B) Lens
C) Still Water
D) Polished wood
Answer: B) Lens
9. Which characteristic of the image formed by a plane mirror is shown by letters on an ambulance?
A) Image distance
B) Size of image
C) Shape of image
D) Lateral inversion
Answer: D) Lateral inversion
10. When a parallel beam of light passes through a magnifying lens, what happens to the light rays?
A) It diverges the rays
B) It converges the rays to a single point
C) It reflects the rays back
D) It scatters the rays randomly
Answer: B) It converges the rays to a single point
11. Based on the straight pipe and bent pipe experiment, what can you conclude about light?
A) Light can travel around corners
B) Light needs a medium to travel
C) Light is a form of energy
D) Light travels in a straight line
Answer: D) Light travels in a straight line
12. What kind of image is formed by a plane mirror?
B) Virtual and inverted
C) Virtual and erect
D) Real and enlarged
Answer: C) Virtual and erect
13. If Newton’s disc containing seven rainbow colours rotates fast, what colour is seen?
A) Red
B) Green
C) Blue
D) White
Answer: D) White
14. Convex lens is also called a magnifying glass because:
A) It always forms real images
B) It always forms inverted images
C) It splits white light into colours
D) It forms a magnified image when very close to the object
Answer: D) It forms a magnified image when very close to the object
15. Match the mirror with its correct use:
Dentist’s mirror
A) Plane mirror, Concave mirror
B) Convex mirror, Concave mirror
C) Concave mirror, Convex mirror
D) Plane mirror, Convex mirror
Answer: B) Convex mirror, Concave mirror
SECTION – B : Short Answer Questions
i) Outer shining surface of spoon acts as: Convex mirror
ii) Nature of image formed: Small and upright (erect)
SECTION – C : Answer the following
i) Optical device used: Convex lens
ii) Two physical characteristics:Thicker at centre andThinner at edges
iii) Can letters appear small through this device? No
SECTION – D : Long Answer
20. A) Guess Who Am I?
i) Fixed in sweet shop walls → Plane mirror
ii) Used by watch mechanic → Convex lens
iii) Gives seven colours from white light → Prism
iv) Same size image, left-right change → Plane mirror
v) Outer shiny surface of steel container → Convex mirror
vi) Makes things look smaller, used in spectacles → Concave lens
vii) Thick at middle, thin at edges → Convex lens
viii) Always smaller and upright image → Convex mirror
20. B) Two characteristics of images
i) Convex mirror
Image is upright
Image is small and virtual
ii) Concave mirror
Image may be real or virtual
Image may be small or enlarged
iii) Convex lens
Image may be real or virtual
Image may be inverted or upright
iv) Concave lens
Image is always virtual
Image is upright and small
Side mirror of a car
Dentist’s mirror
A) Plane mirror, Concave mirror
B) Convex mirror, Concave mirror
C) Concave mirror, Convex mirror
D) Plane mirror, Convex mirror
Answer: B) Convex mirror, Concave mirror
SECTION – B : Short Answer Questions
16. Draw Concave and Convex Lens
(a)Convex lens: Thick at centre, thin at edges(b) Concave lens: Thin at centre, thick at edges
17. Spoon Experiment
i) Outer shining surface of spoon acts as: Convex mirror
ii) Nature of image formed: Small and upright (erect)
SECTION – C : Answer the following
18.
i) Optical device used: Convex lens
ii) Two physical characteristics:Thicker at centre andThinner at edges
iii) Can letters appear small through this device? No
iv) Can we burn paper using this device? Yes
19. Reflected images in a plane mirror
SECTION – D : Long Answer
20. A) Guess Who Am I?
i) Fixed in sweet shop walls → Plane mirror
ii) Used by watch mechanic → Convex lens
iii) Gives seven colours from white light → Prism
iv) Same size image, left-right change → Plane mirror
v) Outer shiny surface of steel container → Convex mirror
vi) Makes things look smaller, used in spectacles → Concave lens
vii) Thick at middle, thin at edges → Convex lens
viii) Always smaller and upright image → Convex mirror
20. B) Two characteristics of images
i) Convex mirror
Image is upright
Image is small and virtual
ii) Concave mirror
Image may be real or virtual
Image may be small or enlarged
iii) Convex lens
Image may be real or virtual
Image may be inverted or upright
iv) Concave lens
Image is always virtual
Image is upright and small