Image Formation by a Plane Mirror

Q.

An object is placed 20 cm in front of a plane mirror. The mirror is moved 2 cm towards the object. The distance between the positions of the original and final images seen in the mirror is : (a) 2 cm (b) 4 cm (c) 10 cm (d) 22 cm

Q.

Question 13
The magnification produced by a plane mirror is +1. What does this mean?

Q.

With the help of a labelled ray-diagram, describe how a plane mirror forms an image of a point source of light placed in front of it. State the characteristics of the image formed in a plane mirror.

Q.

A man stands 10 m in front of a large plane mirror. How far must he walk before he is 5 m away from his image ?

Q.

The letter F is placed in front of a plane mirror : (a) How would its image look like when seen in a plane mirror ? (b) What is the name of the phenomenon involved ?

Q.

If an object is placed at a distance of 10 cm in from of a plane mirror, how far would it be from its image?

Q. What is the meaning of erect image?

Q.

Write the word AMBULANCE as it would appear when reflected in a plane mirror. Why is it sometimes written in this way (as its mirror image) on the front of an ambulance ?

Q.

(a) A boy with a mouth 5 cm wide stands 2 m away from a plane mirror. Where is his image and how wide is the image of his mouth? (b) The boy walks towards the mirror at a speed of 1 m/s. At what speed does his image approach him?

Q.

What type of image is formed : (a) in a plane mirror ? (b) on a cinema screen?

Q.

A plane mirror and an object approach each other with speeds of 5m/s and 10 m/s respectively. The speed of the image will be

1. 5 m/s

2. 15 m/s

3. 20 m/s

4. 25 m/s

Q. If two mirrors are inclined at an angle of 90 degrees such that reflection is taking place at both mirrors then

1. Net deviation suffered by reflected ray will be 180 degrees
2. Reflected ray will be perpendicular to incident ray
3. Net deviation suffered by the reflected ray will be zero
4. None of these

Q.

The figure given alongside shows the image of a clock as seen in a plane mirror. The correct time is : (a) 2.25 (b) 2.35 (c) 6.45 (d) 9.25

Q. what is an real image

Q.

A man sits in an optician's chair, looking into a plane mirror which is 2 m away from him and views the image of a chart which faces the mirror and is 50 cm behind his head. How far away from his eyes does the chart appear to be ?

Q. What should be the minimum height of man "Y" (as shown in figure ) so that he may see image of S in mirror?

1. 120cm
2. 140cm
3. 100cm
4. 130cm

Q.

The image of an object formed by a plane mirror is : (a) virtual (b) real (c) diminished (d) upside-down

Q.

(a) Explain why, though both a plane mirror and a sheet of paper reflect light but we can see the image of our face in a plane mirror but not in a sheet of paper.

(b) The image in a plane mirror is virtual and laterally inverted. What does this statement mean?

(c) Write all the capital letters of the alphabet which look the same in a plane mirror.

Q.

What is word art in computer?

Q. An object is initially at a distance of 160 cm from a plane mirror. If the mirror approaches the object at a rate of 10cm/s then after 4s the distance between the object and its image will be

1. $320cm$
2. $280cm$
3. $240cm$
4. $120cm$

Q.

What is the radius of curvature of a plane mirror?

Q.

Where is the image when you look at something in a mirror ?

Q.

Explain how to read the following message which was found on some blotting paper :

Q.

The image seen in a plane mirror cannot be formed on a screen. What name is given to this type of image?

Q.

Name the phenomenon responsible for the following effect : When we sit in front of a plane mirror and write with our right hand, it appears in the mirror that we are writing with the left hand.

Q. Two plane mirrors M1 and M2 are inclined to each other at an angle of 60 degrees as shown in figure. If a ray is incident at an angle of y degrees with normal on mirror M1 then what will be the value of x in degrees?

1. 100
2. 160
3. 120
4. 240

Q. An object is placed symmetrically between two plane mirrors inclined at an angle of 50 degrees. What will be the number of images formed?

1. 7
2. 5
3. 6
4. 8

Q. A man runs towards mirror with a speed of 10m/s then the speed of his image with respect to himself will be

1. $20m/s$
2. $10m/s$
3. Zero
4. $100m/s$

Q.

What should be the position of object when a concave mirror is used as shaving mirror.

Q.

State and explain the Laws of Reflection.