The focal length of a converging lens is measured for violet, green and red colours. If is fV, fG and fR respectively. We will get
A. fV = fG
B. fG = fR
C. fV < fR
D. fV > fR
Answer:C
The focal length of a converging lens is measured for violet, green and red colours. If is fV, fG and fR respectively. We will get
A. fV = fG B. fG = fR C. fV < fR D. fV > fR