ritikaritz ritikaritz
  • 25-06-2020
  • Physics
contestada

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

Answer Link

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