In a Newtonian reflecting telescope, light rays from distant objects, which are essentially parallel (because they come from so far away), strike the concave main mirror at the same angle.

Instеad, thе rеflеctеd rays appеar to divеrgе from a virtual focal point bеhind thе mirror. Focal Lеngth (f): Thе focal lеngth for a convеx mirror is considеrеd nеgativе (-f ...

Create a concave mirror and look again. Are the skewers parallel to each other? If not, do the tips of the skewers get closer to each other or spread out more? Incident and reflected light rays ...

Mirror is of two types; concave and convex mirror where as lens is a transparent or a piece of glass having a curved side for the dispersion of light rays. Lenses are used in all optical ...

While the glass is molten, the furnace spins at five revolutions per minute; the centrifugal force pushes the glass’ surface into the concave ... rays reflected by different locations on the mirror.

Giant manta rays have been filmed checking out their reflections in a way that suggests they are self-aware. Only a small number of animals, mostly primates, have passed the mirror test ...