The focal length of a converging lens are fv and fR for violet and red light respectively. Then
A. fv > fR
B. fv = fR
C. fv < fR
D. any of the three is possible depending on the value of the average refraction index m
Answer:C
The focal length of a converging lens are fv and fR for violet and red light respectively. Then
A. fv > fR B. fv = fR C. fv < fR D. any of the three is possible depending on the value of the average refraction index m