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The Broken Pencil-Ray Optics
A general classroom demonstration includes placing a pencil (or similar object) within an upright position within a round glass of water. The pencil is then slowly moved across the middle of the glass from a centered position to an off-center position. Since the pencil is moved across the middle of the glass, an interesting phenomenon is observed. The position of the pencil under the water is shifted associative to the position of the pencil above the water - the pencil appears broken.
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
Define about the set-up of Helium-Neon Laser. The laser radiations along with higher coherence, higher directionality and higher monochromacity can be obtained from this. But,
Explain the working of Transformers A transformer often uses a core, which looks like a square donut of iron, to change the voltage applied to the primary coil to a new larger
The phase of weightlessness may be observed in the following situations: (i) When objects fall freely under gravity : For example, a lift goes down freely, or an airship showing
Why does heated air expand? Temperature is often explained as the average thermal energy of the substance at hand. Therefore the hotter a substance is the more thermal energy i
experiments on how sound waves travel faster in iron
Define Adiabatic Atmospheres (Boston, Maryland)? The lower 10-15 km of the troposphere, the atmosphere, is often in a convective stable state with constant entropy, not constan
Its working is based on the principle of tangent law. It having of a small compass needle, pivoted at the centre of a circular box. The box is reserved in a wooden frame having two
The equation of reflected wave for soft boundary: y(x.t)=A cos[(wt-kx)] The equation of reflected wave for rigid boundary: y(x.t)=A cos[(wt+kx)] where A=amplitude of the wave
The points of maximum amplitude are called as antinodes. At ends density and air pressure both are very low.
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