TS EAMCET 03 May 2019 Shift 2 Solved Paper

The following figure shows the lenses of focal length 10, -10 and 30 cm
Calculate the distance of image from lens A using the lend formula.
‌

1

vA

−‌

1

uA

‌‌=‌

1

fA

‌

1

vA

−‌

1

(−30)

‌‌=‌

1

+10

vA‌‌=+15cm
The distance of image from lens B is calculated as,
‌

1

vB

−‌

1

(+10)

‌‌=−‌

1

10

vB‌‌=∞
The distance of image from lens C is calculated as,
‌

1

vC

−‌

1

∞

‌‌=‌

1

30

vC‌‌=+30cm
Therefore, the total distance between object and image is calculated as,
dT‌‌=dOC+VC
‌‌=(30+45)cm
‌‌=75cm