ritikaritz ritikaritz

25-06-2020
Physics

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A device has power -2 D . The device is
a.A convex lens of focal length 50 cm
b.A concave lens of focal length 50 cm
c.A convex lens of focal length 2 m
d.A concave lens of focal length 2 m

Respuesta :

chaman977 chaman977

25-06-2020

Answer:

b.

Explanation:

-vesign shows the lens is CONCAVE

f=1/power

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