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What is the difference between a lens and a mirror?
A mirror is a reflective surface. Light passes by the glass and hits the silver backing, reflecting off of it. (The angle of reflection equals the angle of incidence.)
A lens, on the other hand, does not reflect light; it refracts it. After entering the glass, light refracts in a different way depending on the shape of the lens and also makes a focal point where the refracting light comes to a point. This varies for different lenses -- convex or concave -- which is why there are dissimilar lenses for different types of eyeglasses.
Reducing friction by an air stream Cut out a disc of cardboard about 10 cm in diameter. With a red-hot pin, burn a hole by the centre. Saw a small cotton reel in half and glue
Length contraction (relativity of length) is the length of a body moving with a relativistic velocity v = c relative to an observer is contracted by a factor in the direction of m
A measuring jar or graduate Select several straight-sided glasses jars of assorted sizes. Olive bottles are very useful for the making of graduated cylinders. Paste a strip of
The tree needs to fall uphill even though it is leaning downhill. The felling notch at O is sufficiently large so that the resisting moment at O is negligible. The trunk above po
Silver Symbol Ag Atomic weight 107.868 Atomic number 47 discovery
It is based on the photovoltaic effect. One of the semiconductor regions is made so thin that the light incident on it reaches the p-n junction and gets absorbed. It changes solar
1) Clean coal technology describes new electricity generation processes that are expected to have high efficiencies, be able to minimise environmental impacts, including SO 2 , NOx
assignment on vernier caliper
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In a Newton's ring set up, the gap between the glass plate and the lens is filled with a transparent liquid. If the liquid is replaced by a second liquid, the rings shrink. Which o
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