# Question: a Use ray diagrams to show that a ray parallel

(a) Use ray diagrams to show that a ray parallel to the optic axis of a biconvex lens is refracted toward the axis at the incident surface and again at the exit surface.

(b) Show that this also holds for a biconcave lens, but with both refractions pointing away from the axis.

(b) Show that this also holds for a biconcave lens, but with both refractions pointing away from the axis.

**View Solution:**## Answer to relevant Questions

An object is 40 cm from a converging lens whose focal length is 20 cm. On the opposite side of that lens, at a distance of 60 cm, is a plane mirror. Where is the final image measured from the lens, and what are its ...Two lenses, each having a power of + 10 D, are placed 20 cm apart along the same axis. If an object is 60 cm from the first lens (not in between the lenses), where is the final image relative to the first lens, and what are ...Two parallel slits are illuminated with monochromatic light, and an interference pattern is observed on a screen. (a) If the distance between the slits were decreased, would the distance between the maxima (1) increase, (2) ...A lens with an index of refraction of 1.60 is to be coated with a material (n = 1.40) that will make the lens nonreflecting for yellow-orange (λ = 515nm) light normally incident on the lens. What is the minimum required ...A slit of width 0.15 mm is illuminated with monochromatic light of wavelength 632.8 nm. At what angle will the first minimum occur?Post your question