Case Based Questions (MCQ)

Class 10
Chapter 10 Class 10 - Light - Reflection and Refraction (Term 1)

## A student wants to project the image of a candle  flame on the walls of the school laboratory by  using a mirror.

### (iv) Convex mirror, it forms real image

Ans.

Since the student wants image on a wall , it has to be a real image

Now, let’s check both mirrors

• Convex mirrors always produce virtual images . It cannot be used to produce images on the screen.
• Concave mirrors produce real images on the screen in all cases except when the object is between pole and focus , therefore students should use a concave mirror because it forms real images.

So, the correct answer is (iii) Concave mirror, it forms a real image.

### (iv) At infinity

Ans.

In a concave mirror

• We get a magnified and real image when object is placed between F and C So, the correct answer is (ii) Between F and C

### (iv) At F

Ans.

For a concave mirror

• When rays are coming from infinity , a concave mirror will produce a diminished image on the screen. And for other cases - please check Concave mirror ray diagram

So, the correct answer is (i) at infinity

## (iv) None of the above

Ans.

According to the Cartesian sign convention for spherical mirrors, images formed on the left side of the mirror are signed as negative . So, the correct answer is (ii) negative

## (iv) inverted and enlarged

Ans.
For a concave mirror

• Virtual image is formed when an object is placed between pole and focus .
• And, Image formed is enlarged . So, the correct answer is (i) erect and enlarged

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