Shows a thin lens with centres of curvature `C_1 and C_2`. If `mu = 1.5`, what is its focal length ?
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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.

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 concave lens with unequal radii of curvature made of glass (mu_(g)=1.5) has a focal length of 40cm. If it is immersed in a liquid of refractive index mu_(1)=2 , then

A concave lens with unequal radii of curvature made of glass (mu_(g)=1.5) has a focal length of 40cm. If it is immersed in a liquid of refractive index mu_(1)=2 , then

A thin lens of focal length + 12 cm is immersed in water (mu = 1.33). What is its new 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 of focal length + 12 cm is immersed in water (mu = 1.33). What is its new focal length ?

The focal length of a concavo - convex lens of radii of curvature 5 cm and 10 cm is 20 cm.What will be its focal length in water (mu=4//3) ?

A plano-convex lens (mu = 1.5) has a curved surface of radiys 15 cm. what is its focal length ?