Tag: physics

Questions Related to physics

A _______ mirror is used for converging solar radiation in solar cookers to generate heat.

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. round

Show answer
Correct Option: A
Explanation:

Concave mirror (converging mirrors) is used to concentrate a parallel light beam incident on it at point i.e its focus.

Shaving mirror, rear-view mirror, street lamps, vigilance mirrors. Find the odd one out :

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

  1. Shaving mirror

  2. Rear-view mirror

  3. Street mirror

  4. Vigilance mirror

Show answer
Correct Option: A
Explanation:

Except shaving mirror all uses convex mirrors.

Mirrors on the outside of the passenger side of the cars often contain a message that says something like. "Objects are closer than they appear." In the other words, the images seen in the mirror, although looking like the objects in other respects, appear to be further away than they actually are, because the images are the smaller than the objects.
What kind of mirror is being used in this case? 

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

  1. plane mirror

  2. convex mirror

  3. concave mirror

  4. The mirror could be concave or convex.

  5. The mirror could be flat or concave.

Show answer
Correct Option: B
Explanation:

Convex mirrors are used in this case.

Since the mirrors are bend outwards, a large range in area to view is covered to see objects behind in cars.
The magnification of the objects is lesser than one for distant objects for convex mirrors. Hence the objects appear farther away than they actually are.

Fill in the blank:

________ mirrors are used in roads and driveway.

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. No

Show answer
Correct Option: B
Explanation:

Convex mirrors help in viewing wider area which is not possible with the help of plane and concave mirror. It helps to look over a wide range and thus is helpful in avoiding accident.

What type of mirrors are used in ATM counters?

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. None

Show answer
Correct Option: B
Explanation:

To capture wide area. Convex mirror on widely used in ATM centres.

Find the odd one out:

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

  1. Shaving mirror

  2. Dentist mirror

  3. Headlight of car

  4. Camera

Show answer
Correct Option: D
Explanation:

Spherical mirrors are used as shaving mirror, dentist mirror and reflector in the headlights of the car. Camera, on the other hand, uses convex lens.

What kind of mirror is suitable for street light bulb reflectors?

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. None

Show answer
Correct Option: B
Explanation:

Convex mirrors are used widely as reflectors for street light bulbs as it diverges light ray over a wide area.

_________ mirrors are used in telescopes.

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. No

Show answer
Correct Option: A
Explanation:

Concave mirrors provide large images and the purpose of telescope is to view long distance images.

Mirrors on the outside of the passenger side of cars often contain a message that says something like, "Objects are closer than they appear." In other words, the image seen in the mirror, although looking like the objects in other respects, appear to be further away than they actually are, because the images are smaller than the objects.
What kind of mirror is being used in this case?

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

  1. Plane mirror

  2. Convex mirror

  3. Concave mirror

  4. The mirror could be concave or convex

  5. The mirror could be flat or concave

Show answer
Correct Option: B
Explanation:

The mirror used is a convex mirror. 
Since it forms virtual and 'diminished' images, the objects appear to be distant in the mirror than they actually are.

Also the outward curvature of the mirror makes it cover more area to view.

State whether true or false : 

Convex mirrors enable the driver to view much larger area than would be possible with a plane mirror.

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: A
Explanation:

Convex mirror give an erect ,virtual,full size image of distant object with a wider field of view. Thus,convex mirrors enables the driver to view much larger area than would be possible with a plane mirror.