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Characteristics of Images

State whether...

Question

State whether the following statements are true or false. Rewrite the false statements correctly.
(a) We see planets because they reflect light from the sun.
(b) We see a book because it reflects the light that falls on its surface.
(c) The image formed in a pinhole camera is always inverted.
(d) The image formed in a pinhole camera is always the same size as the object.
(e) The image formed in a plane mirror is upside down.
(f) A plane mirror is opaque.
(g) A shadow is formed on the same side of the object as the source of light.

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Solution

(a) True.

(b) True.

(c) True.

(d) False. The size of the image formed in a pinhole camera is affected by the distance between the object and the pinhole.

(e) False. The image formed in a plane mirror is upright.

(f) True.

(g) False. Shadow of an object is formed on the opposite side of the source of light.

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Similar questions

Q. Write T for the true statement and F for the false one. Correct the false statement(s).
1. We can see an object clearly through a translucent material.
2. Shadows are formed only during the day.
3. A shadow is formed when an opaque object blocks the light falling on it.
4. An inverted image is formed in pin-hole camera.

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. The image formed by a pinhole camera is of the same size as the object. True or false? justify your answer.

Q. The image formed in a pinhole camera is inverted because of the rectilinear propagation of light.

Q. Write True (T) or False (F) against the following statements in the given brackets:
1. Stars are luminous bodies. ( )
2. Translucent objects do not form shadows. ( )
3. An oiled paper is an example of an opaque body. ( )
4. A pinhole camera can take pictures of moving objects. ( )
5. A polished metal surface can't act as a mirror. ( )
6. We can see shadow even if there is no light. ( )
7. A heated iron rod becomes luminous but on cooling it becomes non-luminous. ( )
8. Image of an object is always black, shadow shows the colour of the object. ( )

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