Question

a) 4 cm PLATINUM PACKAGE . b) 8 cm $f = \frac{1}{\frac{\mu - 1}{R_1} - \frac{\mu - 1}{R_2}}$ The radii of curvature of a glass convex lens of focal length 7.5 cm are 5 cm and 15 cm. Then refractive index of glass is a) 4/3 b) 3/2 c) 5/4 d) 5/3 and concave surface of curvature 3

          a) 4 cm
PLATINUM PACKAGE
. 
b) 8 cm
$f = \frac{1}{\frac{\mu - 1}{R_1} - \frac{\mu - 1}{R_2}}$
The radii of curvature of a glass convex lens of focal length 7.5 cm are 5 cm and 15 cm. Then
refractive index of glass is
a) 4/3
b) 3/2
c) 5/4
d) 5/3
and concave surface of curvature 3

$a) 4 cm PLATINUM PACKAGE . b) 8 cm f = (1)/((μ - 1)/(R1) - (μ - 1)/(R2)) The radii of curvature of a glass convex lens of focal length 7.5 cm are 5 cm and 15 cm. Then refractive index of glass is a) 4/3 b) 3/2 c) 5/4 d) 5/3 and concave surface of curvature 3$