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Royal Thakur 5 years, 4 months ago
Yogita Ingle 5 years, 4 months ago
The first practical laser was built by Theodore H. Maiman at Hughes Research Laboratories in 1960. At the time, lasers were an example of cutting edge technology.
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Sia ? 4 years, 6 months ago
vFg :Fw:Fe:Fs=1:1025:1036:1038 . All those quantities which can be measured directly or indirectly and in terms of which the laws of physics can be expressed are called physical quantities. ... The units of the fundamental quantities called fundamental units, and the units of derived quantities called derived units.
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Yogita Ingle 5 years, 4 months ago
The universal law of gravitation states that “the force with which two bodies attract each other is always inversely proportional to the square of the distance between the two bodies and directly proportional to the product of their masses.”
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Royal Thakur 5 years, 4 months ago
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꧁༺★ṖŕīᑎƇɛ {Ƭĥɛ Ŀ❤Ѵɛ Ɠʊŕʊ}★༺꧂ ?? 5 years, 4 months ago
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Meghna Thapar 5 years, 4 months ago
In physics, the dyne is a unit of force specified in the centimetre-gram-second (cgs) system of units, symbol "dyn". One dyne is equal to exactly 10-5 newtons. Further, the dyne can be defined as "the force required to accelerate a mass of one gram at a rate of one centimetre per second squared." A net force of one dyne will accelerate a one-gram mass at the rate of 1 cm/s/s. In the c-g-s system, acceleration due to gravity “g” is 981 cm/s/s and hence, a one-gram of mass would weight 981 dynes.
Gaurav Seth 5 years, 4 months ago
In physics, the dyne is a unit of force specified in the centimetre-gram-second (cgs) system of units, symbol "dyn". One dyne is equal to exactly 10-5 newtons. Further, the dyne can be defined as "the force required to accelerate a mass of one gram at a rate of one centimetre per second squared."
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Yogita Ingle 5 years, 4 months ago
Scattering of a beam of light by the particles of a colloid is called the Tyndall effect. When we apply torch light on a galss of milk then the path of the light becomes visible but it is not so in case of water because in milk light is scattered by its very fine particles.
Tyndall effect can be observed when sunlight passes through the canopy of a dense forest. In the forest, mist contains tiny droplets of water, which act as particles of colloid dispersed in air
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Sia ? 4 years, 6 months ago
the process by which a beam of light or other system of waves is spread out as a result of passing through a narrow aperture or across an edge, typically accompanied by interference between the wave forms produced.
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Sia ? 4 years, 6 months ago
Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated. Common examples include the reflection of light, sound and water waves.
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Sia ? 4 years, 6 months ago
Refraction is the change in direction of a wave passing from one medium to another or from a gradual change in the medium. Refraction of light is the most commonly observed phenomenon, but other waves such as sound waves and water waves also experience refraction.
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Yogita Ingle 5 years, 4 months ago
Reflection of waves is the change in the direction of a wave upon striking the interface between two materials.
When a wave strikes any interface between any two mediums the bouncing back of wave is termed as reflection of waves.
Sachin Singh 5 years, 4 months ago
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