A telescope has an upward-pointing concave mirror of focal length 40 cm which, every night, collects the light from distant stars and focuses it on a camera so it can be analyzed. During the daytime shutdown, however, a 3-cm-long praying mantis creeps along the wire that lies on the axis of the telescope. He pauses at a distance of 60 cm from the mirror, and with his feet holding onto the wire, extends his body horizontally (mantises can do that) so that his body is perpendicular to the axis of the mirror. Is his image real or virtual? Is it upright or inverted? How big is it? Where is it?
Refraction of Light
Refraction is a change in the direction of light rays when they travel from one medium to another. It is the bending of light when it goes through different media.
Angle of Refraction
Light is considered by many scientists to have dual nature, both particle nature and wave nature. First, Particle nature is one in which we consider a stream of packets of energy called photons. Second, Wave nature is considering light as electromagnetic radiation whereas part of it is perceived by humans. Visible spectrum defined by humans lies in a range of 400 to 700 nm wavelengths.
Index of Refraction of Diamond
Diamond, the world’s hardest naturally occurring material and mineral known, is a solid form of the element carbon. The atoms are arranged in a crystal structure called diamond cubic. They exist in a huge variety of colours. Also, they are one of the best conductors of heat and have a very high melting point.
A telescope has an upward-pointing concave mirror of focal length 40 cm which, every night, collects the light from distant stars and focuses it on a camera so it can be analyzed. During the daytime shutdown, however, a 3-cm-long praying mantis creeps along the wire that lies on the axis of the telescope. He pauses at a distance of 60 cm from the mirror, and with his feet holding onto the wire, extends his body horizontally (mantises can do that) so that his body is perpendicular to the axis of the mirror. Is his image real or virtual? Is it upright or inverted? How big is it? Where is it?
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