Cut diamonds reflect and refract available light.
It's a diamond's job to reflect and refract light.
All lenses refract. You are talking about a diverging lens, which is thinner near the centre than near the rim.
Because it is essentially a vacuum (there isn't much there) so light does not have anything to refract or reflect light off of thereby giving a black void appearance.
Gem-quality diamonds -- only about 20% of all diamonds mined -- are cut and polished to reflect and refract light, which gives them sparkle and shine.
Yes, hand lens reflect light.
a lens will refract light. a mirror will reflect the light.
Achromatic means "without color". An achromatic lens is a lens that is virtually free from prismatic color distortions.
John Dollond invented the achromatic lens. He used a combination of crown and flint glasses to construct the lens.
using an achromatic lens
refract
Achromatic lens.
reflect
An achromatic lens is one without chromatic distortion (gives no colour fringing). The achromatism has no direct relation to power.
reflect
Point in a chromaticity diagram representing an achromatic color.Achromatic means without color so an achromatic point could be black or white.It is the point at which starch no longer gives a positive result (blue color) to Iodine test.
The distracting violet fringing of the image in the telescope was limited by the use of an achromatic lens system.