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Properties of light:
The wavefronts can be of different shapes depending on the size and shape of light source and the distance from it. Huygens' principle states that every point on a wavefront behaves as the source of small secondary wavelets which spread out in all directions with a velocity equal to the velocity of light. The new wavefront is then found by constructing a surface of envelope tangential to the secondary wavelets.
Applying Huygens' principle, the phenomenon of reflection and refraction could be explained. The velocity of water waves depend on the depth of the water. The principle of superposition of waves states that when two or more waves travel through the same portion of a medium simultaneously, the resultant displacement at any point is the vector sum of the displacements due to the individual waves.
The retina – the light detector of the eye: The physical aspects of the retina: 1.The absorption of a light photons in a photoreceptor triggers an electrical signal to the bra
The conductive method Heat can be transferred by conduction from warmer to cooler objects, the quantity of heat transfer depends on the temperature difference between the two
The neutrons and protons in a stable nucleus are held together by nuclear forces and energy is required to pull them infinitely apart (or the similar energy is released during the
One side of impregnated paper capacitors is sprayed with metal. When such paper is rolled, its gives higher capacitance for a given value. This capacitor has a self healing proper
The position-time graph for a hot-air balloon that is in flight is shown in the accompanying figure. a) What is the average velocity of the balloon? b) What is the
write a short note on terrestrial telescope
UNIT: SI unit of impulse is NS (Newton x Second) or kgms -1
Michelson-Morley experiment (A.A. Michelson, E.W. Morley; 1887) Probably the most popular null-experiment of all time, designed to check the presence of the proposed "lumenife
a projectile is fired horizontally from an inclined plane (of inclination 45 with horizontal)with speed=50 m/s.if g=10 m/s2 the range measured along the incline is
Formers used for winding coils are ceramic or glass, because they are stable. Copper wire with silver plating is used up to 50 M Hz. Lit wire produces lower RF resistance than soli
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