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The experimental set-up for producing Newton's ring is shown in fig. (A). A plane-convex lenses L of large radius of curvature with its convexities is placed on a plane glass plate P. When light from an extended monochromatic source is allowed to fall on plane glass plate G inclined at an angle of 45 degree to the incident beam, it reflects incident light beam in vertically downward direction on the system (Plano-convex lens L + Plane glass plate P). The light waves reflected form the top and bottom surfaces of the air film produces interference fringes. These interference fringes (rings) may be seen by using a low power microscope.
Describe with the help of a labelled diagram the underlying principle and working of a step-up transformer. Why cannot such a device be used to step-up D.C. voltage? Or Dr
A helium atom is in a galaxy travelling at a speed of 4.89 x 10 6 m/s away from the Earth. An astronomer on Earth observes a frequency from the helium atom of 6.52 x 10 14 H
Surface Mount Devices (SMDs) are new components designed with soldering pads or short leads. They are much smaller in size as compared to leaded components. The SMDs are directly a
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Factors which are affect velocity of sound in gaseous medium is (1) Effect of density (2) Effect of pressure (3) Effect of temperature : (4) Effect of humidity
does lights of different wavelengths help us to see different colour
Number of electrons in the outermost orbit of the element of atomic number 15 is: (1) 1 (2) 3 (3) 5 (4) 7 Ans: 5
If a ring were constructed as knid of a space station. How fast must a 50.0-m-radius ring rotate to simulate Earth's gravity?
Influence the value of g Shape of the earth : (a) At poles : Generally 'g' value is inversely proportional to the radius of the earth ' r' . Due to flattening of the e
South African frogs are capable of jumping as far as 10.0m in one hop. Suppose one of these frogs makes exactly 15 of these jumps in a time interval of 60.0s. What is the frogs ave
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