Find out the correct option from the following. (A) The magnification is positive for all virtual images and negative for all real images. (B) The magnification of concave lens and convex mirror is always positive whereas the magnification of convex lens and concave mirror can be positive or negative depending on the position of the object before the lens.
(a) Only A is true
b) Only B is true.
(c) Both A and B are true
(d) Both A and B are false
Answers
Explanation:
The concave lens and the convex mirror always produce a virtual image, therefore, their magnification is always positive whereas the convex lens and the concave mirror can produce real as well as the virtual image depending upon the object position, therefore, their magnification can be positive or negative. Answer- C.
Answer:
Correct option is
B
Only B is true.
Magnification of a concave lens or a convex mirror is always positive because they always form virtual and erect images. It can be negative or positive for a convex lens or a concave mirror.
Positive magnification for virtual images and negative magnification for real images is true only when a single optical device is used. When used as a combination, a virtual and inverted image may be formed. One such example is a compound microscope.