Uses of Convex Mirrors

We saw that, image formed by convex mirrors is

Position of the object Position of the image Size of the image Nature of the image
At infinity  At the focus F,
behind the mirror 
Highly diminished,
point-sized
Virtual and erect
Between infinity
and the pole P of
the mirror
Between P and F,
behind the mirror
Diminished  Virtual and erect

So, we see that Convex Mirrors always give diminished and erect image

Uses of Convex Mirrors - Teachoo.jpg

These mirrors are used as

Rear View Mirror for Vehicles

They are used by drivers to see back side while driving

A convex mirror is used as a rear-view mirror because

the image provided by a convex mirror is

Erect - Hence, the image produced to the driver is not inverted, it’s right side is up.

Diminished - Hence, the image produced is much smaller than the actual size of the object. This helps in providing a wider field of view.

 

Shop Security Mirrors

Shopkeepers install convex mirrors at different places on their shop

This help them keep track of thieves and shoplifters

Since these mirrors give wide field of view, a large portion of shop can be seen with the help of a single mirror

 

Use of Concave Mirrors

We saw that, image formed by concave mirrors is

Position of the
object
Position of the
image
Size of the
image
Nature of the
image
At infinity At the focus F   Highly diminished,
point-sized
Real and inverted
Beyond C  Between F and C  Diminished  Real and inverted
At C  At C  Same size  Real and inverted
Between C and F  Beyond C  Enlarged  Real and inverted
At F  At infinity  Highly enlarged  Real and inverted
Between P and F  Behind the mirror  Enlarged  Virtual and erect

So, we see that Concave mirror gives

  • Enlarged image when object is between pole and focus
  • Parallel ray of light when object is placed at focus
  • Converges rays of light at the focus

Now, using these results, we see the uses of Concave Mirrors

 

Use of Concave Mirrors - Teachoo.jpg

Used as Shaving Mirrors and Makeup Mirrors

It is because when they are kept near the face, the face is within the focus of concave mirror

It produces enlarged virtual image of object

 

Used by Dentist to see larger image of teeth

It is because when they are kept near the patient's teeth, the face is within the focus of concave mirror

It produces enlarged virtual image of patient's teeth so that dentist can see image of teeth easily

 

Used in torches, beam lights

Light bulb is placed at focus

This produces powerful parallel beam of light. This can be seen at large distance

 

Used in Solar Furnaces to Produce Heat

They have concave reflector

They concentrate sunlight and reflect it

Hence they convert solar energy into heat energy

 

Questions 

Question 4 Page 168 - Why do we prefer a convex mirror as a rear-view mirror in vehicles?

View Answer

 

NCERT Question 8 - Name the type of mirror used in the following situations.

(a) Headlights of a car.

(b) Side/rear-view mirror of a vehicle.

(c) Solar furnace.

Support your answer with reason.

View Answer

  1. Class 10
  2. Chapter 10 Class 10 - Light - Reflection and Refraction

About the Author

Davneet Singh's photo - Teacher, Computer Engineer, Marketer
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.