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Mirror Formula Examples

Consider the ...

Question

Consider the following statements.
1. The minimum size of a mirror required to see the full image of a person is half the height of the person.
2. A convex mirror always forms a virtual, erect and diminished image.
3. The laws of reflection are true for all reflecting surfaces.
4. The focal length of a plane mirror is zero.
Which of the statement(s) given above is/are correct?

A

1, 2 and 3

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B

1, 3 and 4

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C

2, 3 and 4

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D

1, 2, 3 and 4

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Solution

The correct option is B 1, 2 and 3
Statement 4 is incorrect because focal length of plane mirror is infinite, not zero. Statements 1, 2 and 3 are correct.

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Similar questions

Q. State whether the following statements are true or false. Rewrite the false statements correctly.
(a) The laws of reflection hold good only for plane mirrors and not for spherical mirrors.
(b) The radius of curvature is double the focal length of a concave mirror.
(c) A ray passing through the focus cuts through the principal axis of a concave mirror after reflection.
(d) When an object is placed between a concave mirror and its focus, the image formed is virtual, erect and larger than the object.
(e) The image formed on a cinema screen is virtual.
(f) A convex mirror is used by stage artists.
(g) A convex mirror always gives real images.
(h) A pinhole camera gives a real image.
(i) A convex surface bulges inwards.
(j) Incident rays parallel to the principal axis of a curved mirror pass through the focus after reflection.
(k) A concave mirror always forms a real image.
(l) There can be many reflected rays for a single incident ray falling on a reflecting surface.

Q. Assertion (A): The magnification of a convex mirror is always positive and less than unity.

Reason (R): The image formed in a convex mirror is always virtual, erect and diminished in nature.

Then, which of the following statements is correct?

Q. A person of height

2 m

is standing in front of a plane mirror. Find the minimum height of the mirror required, so that the person can see his full size image.

Q. Match the following:

(A) Plane mirror	(1) Always virtual, erect and dimnished image
(B) Convex mirror	(2) Image is erect and of the same size as the object
(C) Convex lens	(3) Used by dentists to see enlarged images of teeth
(D) Concave mirror	(4) Used in microscope.

Q. Which of the following are true regarding image formation with the help of mirrors?
1.A concave mirror can give a diminished virtual image.
2.A concave mirror can give a real image.
3.A convex mirror can give a virtual image.
4.A convex mirror cannot give a real image,

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