Question

The Power of two lenses X and Y is 5D.If the Focal length Of X be 15cm, calculate the focal length of lens Y. ​

Answer 1

Answer:

Hope this helps you please mark it as the brainliest and please follow me if you want to.

Step-by-step explanation:

Focal length of lens X = 15 cm = 0.15 m

Power of lens X

= 1/0.15

= 100/15

= 20/3

= +6.66 D

Power of Combination of lenses X & Y

= power of lens X + power of lens Y

5 = 6.66 + Power of lens Y

Power of lens Y

= 5-6.66

= -1.66 D

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Focal length = 1/Power

f = 1/(-1.66)

f = -0.6 m

f = -60 cm

Answer 2

Answer:

-60 hope this helps you....