Question

Focal length of converging lens is 20 cm, S = 80 cm and d = 100 cm. Find the position co-ordinate of final image after one refraction and reflection at mirror –

• A. 3.16 cm, 0
• B. 8.23 cm, 0
• C. 10.53 cm, 0
• D. 1.16 cm, 0

Answer 1

Answer: (A)

3.16 cm, 0

Answer 2

In parabolic mirror, parallel incident ray converge at focus

y² =

Here $\mathrm { t } = \frac { 1 } { 32 } \mathrm {~m}$

Image will formed at $\frac { 1 } { 32 }$m or 3.16 cm