Question

(iii) real and inverted
(iv) virtual and inverted
(b) Concave mirrors form images that are
(i) vinual and erect
(ii) real and inverted
(ii) real and erect
(iv) both ) and (ii)
(c) A real image
(i) is inverted
(ii) can be obtained on screen
(ii) is erect
(iv) both (i) and (ii)
(d) Which of the following is not a convex mirror?
6) Shaving mirror
D) Rear-view mirror of a car
(ii) Dentist's mirror
Both ) and (in)
(e) Which of the following can form an image larger than the object?
Plane mirror
Convex lens
(i) Convex mirror
V Concave lens
in Which of the following always forms a virtual image!
Convex mit​

Answer 1

Explanation:

(a) An image that cannot be obtained on a screen is called ____________.

(b) Image formed by a convex __________ is always virtual and smaller in size.

(c) An image formed by a __________ mirror is always of the same size as that of the object.

(d) An image which can be obtained on a screen is called a _________ image.

(e) An image formed by a concave ___________ cannot be obtained on a screen.

Answer:

(a) An image that cannot be obtained on a screen is called virtual image.

(b) Image formed by a convex mirror is always virtual and smaller in size.

(c) An image formed by a plane mirror is always of the same size as that of the object.

(d) An image which can be obtained on a screen is called a real image.

(e) An image formed by a concave lens cannot be obtained on a screen.

Question2.

Mark ‘T’ if the statement is true and ‘F’ if it is false:

(a) We can obtain an enlarged and erect image by a convex mirror. (T/F)

(b) A concave lens always forms a virtual image. (T/F)

(c) We can obtain a real, enlarged and inverted image by a concave mirror. (T/F)

(d) A real image cannot be obtained on a screen. (T/F)

(e) A concave mirror always forms a real image. (T/F)

Answer:

(a) We can obtain an enlarged and erect image by a convex mirror. (F)

Explanation: -

Image formed by a convex mirror is always diminished and erect.

(b) A concave lens always forms a virtual image. (T)

(c) We can obtain a real, enlarged and inverted image by a concave mirror. (T)

(d) A real image cannot be obtained on a screen. (F)

Explanation: -

A real image is always obtained on a screen.

(e) A concave mirror always forms a real image. (F)

Explanation: -

Concave mirrors can form both real and virtual images.

Question 3.

Match the columns:

Column 1 Column 2

(a) A plane mirror (i) used as a magnifying glass.

(b) A convex mirror (ii) can form image of objects spread over a large area.

(c)A convex lens (iii) used by dentists to see enlarged image of teeth.

(d)A Concave mirror (iv) the image formed is always inverted and magnified.

(e) A Concave lens (v) the image is erect and of the same size as the object.

(vi) The image is erect and smaller.

Answer:

(a) A plane mirror (v) the image is erect and of the same size as the object.

(b) A convex mirror (ii) Can form image of objects spread over a large area.

(vi) The image is erect and smaller in size than the object.

(c) A convex lens (i) Used as a magnifying glass.

(d) A concave mirror (iii) Used by dentists to see enlarged image of teeth.

(e) A concave lens (vi) The image is erect and smaller in size than the object.