The dispersive power of crown and flint glasses are "0.02" and "0.04" respectively.What is the focal length of a convex lens of crown glass which makes an achromatic doublet with a concave lens of flint glass of focal length 80cm

A plano - convex lens is made of flint glass. Its focal length is

The dispersive powers of crown and flint glasses are 0.02 and 0.04 respectively. In an achromatic combination of lenses the focal length of flint glass lens is 40 cm . The focal length of crown glass lens will be

The dispersive power of crown and flint glasses are 0.02 and 0.04 respectively. If the difference between the refractive indices of blue and red colours is 0.012 for crown glass and 0.022 for flint glass, calculate the angle of the two prisms for a deviation of 8^(@) (without dispersion).

The dispersive powers of crown and flint glasses are 0.03 and 0.05, respectively. If the difference between the refractive indices for red and blue is 0.014 crown glass and 0.023 for flint glass, calculate the angle of a flint glass prism which would produce a net deviation of 5^(@) with a crown glass prism of 3^(@) . [ Hint: Net deviation = (mu -1) A+(mu'-1)A' ]

What is the power of a convex lens whose focal length is 80 cm?