Optics Ques 66
- Which one of the following spherical lenses does not exhibit dispersion? The radii of curvature of the surfaces of the lenses are as given in the diagrams
$(2002,2 M)$
(a)
(b) $R$
(c)
(d)
Show Answer
Answer:
Correct Answer: 66.(c)
Solution:
Formula:
Refraction at Spherical Thin Lens:
- $\frac{1}{f}=(\mu-1) (\frac{1}{R _1}-\frac{1}{R _2})$
For no dispersion, $d[\frac{1}{f}]=0$
or
$ R _1=R _2 $
BETA
