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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.
To work out the gravitational potential energy of an object the equation is: GPE = m x g x h Where: m = the mass of the object (kg) g = gravitational field strength (on earth tha
Molecules: Let us take a piece of matter, for example, a drop of water and see what happens when it is sub-divided into smaller and smaller portions. The drop is first cut
When a body or a moving particle repeats its motion along an exact path after regular parts of time, its rotation is said to be Periodic Motion and interval of time is known as per
An open barge has the dimensions 22x40x12m. If the bargeis made out of 4.0-cm-thick steel plate on each of its four sides and its bottom, what mass of coal can the barge carry in f
Motion of an object in a straight line is called one dimensional motion. The location of a particle in one dimensional motion can be explained by only one variable (say x). For a p
What is electrostatic shielding?
Que: When light is vertically polarized what is it regarding the light that is vertical? Ans: It is the electric field somewhat than the magnetic field that gets most o
In accrued model of a rotating diatomic molecule of (Cl 2 ), the two Cl atoms are 2.00´ 10? -10 m apart and rotate about their center of mass with angular speed w = 2.00 ´10 12 ra
Find out which tray will produce ice cubes first? Suppose you have two ice cube trays. One is filled with hot water and the other with cold water. Which tray will produce ice cu
As electric field is conservation, work done and as potential difference among two points is path independent and depends only on the position of points between which the charge is
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