Ray Optics And Optical Instruments Ques 45
45. An achromatic combination of lenses is formed by joining
[1995]
(a) 2 convex lenses
(b) 2 concave lenses
(c) 1 convex and 1 concave lens
(d) 1 convex and 1 plane mirror
Show Answer
Answer:
Correct Answer: 45.(c)
Solution:
- (c) If two or more lenses are combined together in such a way that this combination produces images of the same colour at the same point and of the same size, then this property is called ‘achromatism’. Concave and convex type of lenses are used for this combination.
BETA
