A small vertical mirror hangs on the wall,1.40 m above the floor. Sunlight strikes the mirror, and thereflected beam forms a spot on the floor 2.50 m from the wall.Later in the day, you notice that the spot has moved to a point3.75 m from the wall. (a) Were your two observations made in themorning or in the afternoon? Explain. (b) What was the change inthe Sun’s angle of elevation between your two observations?
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 small vertical mirror hangs on the wall,
1.40 m above the floor. Sunlight strikes the mirror, and the
reflected beam forms a spot on the floor 2.50 m from the wall.
Later in the day, you notice that the spot has moved to a point
3.75 m from the wall. (a) Were your two observations made in the
morning or in the afternoon? Explain. (b) What was the change in
the Sun’s angle of elevation between your two observations?
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