Question

A convex lens of focal length 25 cm and a concave lens of focal length 10 cm are placed in close contact with each other calculate the lens power of this combination

Answer 1

Hey mate!!

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Power = 1/focal length

→ If thin lens placed in contact to each other

P = p1 + p2

1/f = 1/f1 + 1/f2

1/f. = 1/25 +1/(-10)

1/f = -15/250

P = -250/15

P = - 16.67

Hope it helps!!

#Happy Holi