Light Quiz

In the given ray diagram, point X represents the position where reflected rays meet. What does X most likely represent?

1. The pole of the mirror
2. The centre of curvature
3. The focal point
4. The radius of the mirror

Answer: (c) The focal point

When a person observes their full reflection in a clean, flat bathroom mirror while raising their right hand, they notice that their reflection appears to raise its left hand. Which of the following best describes the nature of the image formed?

1. Real, laterally inverted, upright
2. Virtual, not laterally inverted, inverted
3. Real, upright, not inverted
4. Virtual, laterally inverted, upright

Answer: (d) Virtual, laterally inverted, upright

An object is placed in front of a convex mirror. What is the most accurate description of the image formed?

1. Larger, real, and inverted
2. Same size, real, and upright
3. Diminished, virtual, and upright
4. Magnified, virtual, and inverted

Answer: (c) Diminished, virtual, and upright

Match the mirror type in column A with image type likely to form in column B: Mirror Type Image Type Likely to Form A Plane mirror 1 Virtual and magnified (when close) B Shaving mirror 2 Virtual, erect, wide field view C Convex mirror 3 Always real, inverted, can be magnified D Rear view mirror 4 Always virtual, erect, diminished

1. A- 2, B- 3, C- 1, D- 4
2. A- 3, B- 1, C- 4, D- 2
3. A- 4, B- 3, C- 1, D- 2
4. A- 1, B- 4, C- 2, D- 3

Answer: (b) A- 3, B- 1, C- 4, D- 2

What kind of image is formed in Setup B when the candle is moved farther from the mirror?

1. Real and inverted
2. Virtual and upright
3. Diminished and real
4. No image is formed

Answer: (a) Real and inverted

If the speed of light is highest in medium M and lowest in medium O, which order of optical density is correct?

1. M < N < O
2. O < M < N
3. N > O > M
4. M > O > N

Answer: (a) M < N < O

A student places two identical glass prisms next to each other with their bases opposite. What will happen to the dispersed colours from the first prism?

1. They will disperse further
2. They will recombine into white light
3. They will reflect back
4. They will disappear

Answer: (b) They will recombine into white light

If an object is moved from infinity towards the pole of a concave mirror, what happens to the image?

1. It moves from focus to centre
2. It becomes more and more virtual
3. It moves from focus to infinity
4. It moves from focus to mirror and becomes virtual eventually

Answer: (d) It moves from focus to mirror and becomes virtual eventually

Read the statements and choose the correct option: Assertion: A concave mirror can be used to concentrate light to a single point. Reason: A concave mirror converges parallel light rays to a focal point due to the curved shape of its surface.

1. Both assertion and reason are correct, and the reason explains the assertion.
2. Both assertion and reason are correct, but the reason does not explain the assertion.
3. The assertion is correct, but the reason is incorrect
4. Both assertion and reason are incorrect

Answer: (a) Both assertion and reason are correct, and the reason explains the assertion.

If a light source is moved closer to an object, what happens to the size of the shadow cast by the object?

1. The shadow becomes larger and sharper
2. The shadow becomes smaller and sharper
3. The shadow remains the same size
4. The shadow disappears

Answer: (a) The shadow becomes larger and sharper