Question

00
36. A diverging concavo-convex lens of radii of
curvature 20 cm and 40 cm has refractive index
Its focal length is (in cm)
(1) - 40 cm A i = 30' A = 90
(2) - 80 cm Ø
10 foto
(3) + 40 cm
VA) + 80 cm
umy lonces of focal lengths 20 cm​

Answer 1

hjjj+j+uubhhhuuuu to all