Question

1) Whats the focal point equation?

2) Whats the ocular focus with respect to the light spectrum?

Answer 1

Focal point. The focal point of a lens or mirror is the point in space where parallel light rays meet after passing through the lens or bouncing off the mirror.

Focal point equation is given by ..

1/u + 1/v = 1/f,

Focal length of lens will change with the frequency of light

Focal length varies directly with wavelength and as wavelength is inversely with refractive index, its also varies inversely with the wavelength . Focal length increases withw and decreases with refractive index .