Tag: uses of curved mirrors

Questions Related to uses of curved mirrors

Which is the wrong statement out of the following?

physics reflection of light at curved surfaces uses of curved mirrors uses of spherical mirror uses of spherical mirrors

  1. A concave mirror can give a virtual image.

  2. A convex mirror can give a virtual image.

  3. A concave mirror can give a diminished virtual image.

  4. A convex mirror cannot give a real image.

Show answer
Correct Option: C
Explanation:

The properties of image formed for different object distance are listed below:
Concave mirror:
1)u<f----virtual image , enlarged.
2)f,u,2f---Real, inverted, magnified.
3)u>2f----Real, inverted, diminished.
Convex mirror:
for any object distance virtual,errect and enlarged image.

State whether true or false.
A concave mirror is always used as a street light reflector.

physics reflection of light at curved surfaces uses of curved mirrors uses of spherical mirror uses of spherical mirrors

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

Convex mirrors are used as reflectors in street lights because they are able to spread the light over a wide area.

The temperature in a spherical reflector type solar cooker is raised to more than $500^o C$ by :

physics reflection of light at curved surfaces uses of curved mirrors uses of spherical mirror uses of spherical mirrors

  1. concentrating energy at one point by using a concave reflector

  2. proper insulation of the cooker

  3. concentrating energy at one point by using a covex reflector

  4. both (A) and (B)

Show answer
Correct Option: A
Explanation:

The temperature in a spherical reflector type solar cooler is raided to more than $500^\circ C $ by concentrating energy at one point by using a concave reflector.

Which of the following mirrors is used to concentrate light on a given spot?

physics reflection of light at curved surfaces uses of curved mirrors uses of spherical mirror uses of spherical mirrors

  1. concave mirror

  2. convex mirror

  3. plane mirror

  4. both (B) and (C)

Show answer
Correct Option: A
Explanation:

concave mirror focuses a beam of light from infinity at a point

The mirror used in search lights is.

physics reflection of light at curved surfaces uses of curved mirrors uses of spherical mirror uses of spherical mirrors

  1. concave

  2. convex

  3. plane

  4. convex lens

Show answer
Correct Option: A
Explanation:

The mirror used in search lights is a concave mirror

Concave mirrors are used in :

physics reflection of light at curved surfaces uses of curved mirrors uses of spherical mirror uses of spherical mirrors

  1. reflecting telescopes

  2. magic-lanterns

  3. cinema projectors

  4. all the above

Show answer
Correct Option: D
Explanation:

All the above mentioned optical objects use  concave mirrors.

Shaving mirrors are :

physics reflection of light at curved surfaces uses of curved mirrors uses of spherical mirror uses of spherical mirrors

  1. convex mirrors

  2. concave mirrors

  3. plane mirrors

  4. dangerous mirrors

Show answer
Correct Option: B
Explanation:

Shaving mirrors need to be concave mirrors

The mirror used by dentists to concentrate light on the tooth to be examined is a ________ mirror.

physics reflection of light at curved surfaces uses of curved mirrors uses of spherical mirror uses of spherical mirrors

  1. concave

  2. plane or concave

  3. convex

  4. plane

Show answer
Correct Option: A
Explanation:

The mirror used by dentists to concentrate light on the tooth to be examined is a concave mirror.

Dentist's mirror is ...........

physics reflection of light at curved surfaces uses of curved mirrors uses of spherical mirror uses of spherical mirrors

  1. Concave mirror

  2. Convex mirror

  3. Plane mirror

  4. Convex lens

Show answer
Correct Option: A
Explanation:

$ \bf{Concave\ mirrors} $ are used by dentists because at a short range (object distances less than the focal length of the mirror) they produce enlarged, erect and virtual images. It is useful to have a magnified image of a tooth when repairing cavities, cracks, or other abnormalities.

Hence, the correct answer is OPTION A.

Name the type of mirror used as a shaving mirror

physics reflection of light at curved surfaces uses of curved mirrors uses of spherical mirror uses of spherical mirrors

  1. Concave mirror

  2. Convex mirror

  3. Plane mirror

  4. None of the above

Show answer
Correct Option: A
Explanation:
Concave mirror is used as shaving mirror. This is because it produces a virtual, erect and magnified image of our face when held in front of the face at a distance less than its focal length thus, allowing us to observe our face closely.

Hence, the correct answer is OPTION A.