Image Formation by Concave Mirrors

Q. A watch shows time as 3:25. When seen through a mirror, time appeared will be _______. Ignore the labels on the clock.

1. 8:35
2. 9:35
3. 7:35
4. 8:25

Q.

Define linear magnification produced by a mirror

Q.

When a plane mirror is rotated through a certain angle, the reflected ray turns through twice as much and the size of the image

1. is doubled

2. is halved

3. becomes infinite

4. remains same

Q.

The image formed by magnifying glass is

1. virtual and inverted

2. real and inverted

3. real and erect

4. virtual and erect

Q.

Differentiate between real and virtual image in brief [5m]

Q.

A virtual image formed by a concave mirror is always (a) ____ and a virtual image formed by a convex mirror is always (b) _____ .

1. (a) diminished

   (b) diminished

2. (a) diminished

   (b) enlarged

3. (a) enlarged

   (b) enlarged

4. (a) enlarged

   (b) diminished

Q.

Rays from Sun converge at a point 15 cm in front of a concave mirror. Where should an object be placed so that size of its image is equal to the size of the object?

1. $15cm$ in front of the mirror

2. $30cm$ in front of the mirror

3. between $15cm$ and $30cm$ in front of the mirror

4. more than $30cm$ in front of the mirror

Q.

(a) What is a virtual image?
(b) When is a virtual formed? [3 MARKS]

Q.

A concave mirror can form:

1. True

2. Erect image
3. Inverted image

4. False

Q. The image formed by a slide projector the screen is

Q. Which word would not read the same in a plane mirror?

1. WOW
2. MOM
3. NON
4. TOT

Q.

Which of the following statements is wrong regarding a concave mirror?

1. A concave mirror converges the parallel rays of light falling on it on a single point called focus

2. A concave mirror only forms a real image

3. A concave mirror may form both real and virtual image of a real object

4. A concave mirror always forms a diminished image of a real object

Q.

In a concave mirror, if the object is placed between focus and centre of curvature then where will the image be formed?

1. between focus and center of curvature

2. at centre of curvature

3. beyond centre of curvature

4. at focus

Q.

Given only one ray of light from the object, where will the image be formed?

1. image is formed at pole

2. cannot be determined, since we need at least 2 rays to form a image

3. at A point

4. forms at infinity

Q. In a concave mirror, the image of an object is formed for an object at infinity. The characteristics of this image will be:

1. Real and diminished
2. Real and enlarged
3. Virtual and magnified
4. Virtual and diminished

Q.

Assume the distance between sun and mirror is infinity and the sun is much above the principal axis. Where will the image of the sun be formed?

1. in focal plane but above principal axis

2. at f

3. at R

4. in focal plane but below principal axis

Q.

The minimum distance between the object and the image formed by a concave mirror when the object is placed at C is equal to ___.

1. 2F

2. F/2

3. zero

4. F

Q. Aimage can be caught on a screen whereas a image cannot be caught on a screen.

1. Real
2. virtual
3. Magnified
4. diminished

Q.

What is real, virtual, effect image?

Q.

An object is placed at the centre of curvature of a concave mirror. The focal length of the mirror is 20cm. A plane mirror is placed on the left of the object as shown in the figure. Considering the image formed by the plane mirror as the object for the concave mirror, where will the new image be formed?

1. At f

2. Between f and C

3. At C

4. Beyond C

Q.

Question 1 (d)
Fill in the blank:
An image which can be obtained on a screen is called a _________ image.

Q.

Rays from the sun converge at a point 15 cm in front of a concave mirror. Where should an object be placed in front of this mirror so that the size of its image is equal to the size of the object?

1. 15 cm in front of the mirror

2. 30 cm in front of the mirror

3. More than 30cm in front of the mirror

4. Less than 30 cm in front of the mirror

Q.

An image which can be obtained on a screen is known as a _____.

1. virtual image

2. real image

3. magnified image

4. diminished image

Q. A boy runs from infinity to the pole of a concave mirror. Sort the position of image with the earliest at the top.

1. At focus
2. Between C and F
3. At infinity
4. Behind the mirror

Q.

Try matching the object positions to the right image positions for a concave mirror.

1. At the focus F
2. Beyond C
3. Between F and C
4. At infinity

Q.

If a mirror forms diminished, real and inverted image then choose the type of the mirror and the position of object.

1. concave, between focus and pole of mirror

2. convex, beyond centre of curvature

3. convex, between focus and center of curvature

4. concave, beyond centre of curvature

Q.

At what distance from a concave mirror of focal length 25 cm should an object be placed so that the size of the image is equal to the size of the object?

1. 50 cm

2. At infinity

3. 12.5 cm

4. 25 cm

Q.

The radius of curvature of a concave mirror is 10 cm. At what distance from the pole of the mirror would an image of the sun be formed?

1. 20 cm

2. 5 cm

3. 10 cm

4. α

Q.

Choose the ray diagram which shows the image formation for the given object.

1. 

2. 

3. 

4. 

Q.

difference between real and virtual image