The power of lens is 2.5 D . What is its focal length ?
A thin lens of focal length + 12 cm is immersed in water (mu = 1.33). What is its new focal length ?
A thin lens with centres of curvature C_(1) and C_(2) is shown in the figure given below. If the refractive index of material of lens is 1.5, calculate the focal length in cm.
A plano-convex lens (mu = 1.5) has a curved surface of radiys 15 cm. what is its focal length ?
The focal length of a concave-convex lens of radii of curvature 5 cm and 10 cm is 20 cm. what will be its focal length in water ? Given .^(a)mu_(w) = 4//3 .
A double convex thin lens made of the refractive index 1.6 has radii of curvature 15 cm each. What is the focal length (in cm) of this les when immersed in a fluid of refractive index 1.63?
A plano-convex lens has refractive index 1.6 and radius of curvature 60 cm. What is the focal length of the lens?
If the plane surface of a plano-convex lens of radius of curvature R and refractive index mu is silvered, then its focal length would be
A biconvex lens (mu=1.5) has radius of curvature 20cm (both). find its focal length.
A plano-convex lens is made of glass of refractive index 1.6. the radius of curvature of its curved surface is 30 cm. What is the focal length of the lens ?
