Light Test

Result

Light Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

Read the following statements and choose the correct option:

Statement A: A convex lens always forms a real image.

Statement B: A concave lens always forms an imaginary image.

A
Both statements A and B are correct.

B
Statement A is correct, but statement B is incorrect.

C
Statement A is incorrect, but statement B is correct.

D
Both statements A and B are incorrect.

Solution

Statement A is incorrect, but statement B is correct.
Convex lens forms a real and inverted image if the object is placed beyond F When the object is placed between the focus and the optical center of the lens imaginary image is formed.
Concave lens always forms a imaginary and diminished image (smaller than the object size).
Question 2
1 / -0

An image of the sun is formed by a concave mirror. The lower half of the mirror is now coated black. Now, which of the following statements is correct?

A
The image size is reduced to half.

B
The size and intensity of the image remain unaltered.

C
The size of the image remains the same, but it is less intense.

D
The size and intensity of the image are reduced to half.

Solution

The number of light rays falling on the mirror is reduced. So, the intensity is reduced, but the size of the image remains the same.
Question 3
1 / -0

Which of the following statements is/are true for a convex mirror?

A
The image formed by a convex mirror is always virtual.

B
The light rays passing through the centre of curvature of a convex mirror are incident normally on the mirror.

C
The image formed by a convex mirror is always behind the mirror, and is erect.

D
All of the above

Solution

The image formed by a convex mirror is always virtual. The light rays passing through the centre of curvature of a convex mirror are incident normally on the mirror. The image formed by a convex mirror is always behind the mirror, and is erect.