The focal length of converging lens is measured for violet, green and red colours. It is respectively 
. We will get
A
B
C
D
.
Text Solution
Verified by ExpertsThe correct answer is:
A
: 
Since the refractive index of violet colour 
is greater than the refractive index of red colour 
, therefore focal length of violet colour is less than the focal length of red colour or in other words, 
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