Tag: physics

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

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

  1. Concave mirror

  2. Convex mirror

  3. Plane mirror

  4. Convex lens
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

Name the type of mirror used as a shaving mirror

  1. Concave mirror

  2. Convex mirror

  3. Plane mirror

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
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. 
Multiple choice physics reflection of light at curved surfaces uses of curved mirrors uses of spherical mirror uses of spherical mirrors

Use of concave mirrors:

  1. for examining internal parts of ear, nose, mouth by physicians

  2. to focus sunlight to produce heat in solar furnaces

  3. as reflectors in headlights of vehicles, torch light to produce strong parallel beam of light

  4. all of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Concave mirrors help to produce large image helps doctors to examine body parts and also are used to auto mobile mechanics to produce strong parallel beam of light during night. Concave mirrors are used to focus sunlight to produce heat from solar furnaces.