Question

When a concave mirror has been used as a shaving mirror, where is the face of a person should be held in relation to the focus of the mirror?
A. between pole and mirror
B. above pole and focus
C. below pole and focus
D. between pole and focus

Answer 1

Hint: A concave mirror is used for the usage as a shaving mirror. It is because when the concave mirror is fixed very close to the object or the person viewing through it, there we get an enlarged image which is a virtual image also. This may help you to solve this question.

Complete answer:
First of all let us draw the ray diagram of a concave mirror which can be useful as a shaving mirror.
For this, we have to know the characteristics of the mirror which is useful for the shaving. A person who is looking at the mirror should feel more closely in the mirror. And the image should be magnified or enlarged to get a better view. And also the mirror should produce an image which is upright. This will be formed only when the image is virtual in nature. For all these properties to be obtained, the concave mirror has been used in which the object should be placed at a distance less than its focal length. That is the object should be kept in between the pole and focus.

So, the correct answer is “Option D”.

Note:
Concave mirrors are generally used in headlights of vehicles and automobiles. They are helpful as reflectors in devices like torchlights, railway engines and so on. This by keeping the light source at the exact focus of the mirror, therefore the reflected light rays travel over a great distance as parallel light beams having high intensity.