Write any three differences between speed of light and Speed of sound.
Answers
Speed of Sound:-
Sound is actually a wave. To be precise sound is a longitudinal wave. A longitudinal wave oscillates the particles so that the oscillation is parallel. The amplitude of these oscillations decides the intensity of sound (how loud the sound is). It is obvious that to create a sound there must be a mechanical oscillation. It must be noted that sound always requires a medium to travel. There will be no sound in a vacuum. The speed of sound is defined as the distance the sound wave travels through an elastic medium per unit time
Speed of Light:-
According to the theory of relativity the speed of light is the maximum velocity any object can hypothetically obtain. It can be shown that any object having a rest mass cannot obtain speed of light as it requires an infinite amount of energy.
Light is a form of electromagnetic wave. It does not require a medium to travel. However, it is theoretically suggested and practically proved that light also has particle characteristics. This is known as the wave particle duality of matter. Every matter has this duality. As said earlier the theory of relativity suggests the relative velocity between any two objects cannot take velocities higher than the speed of light.It must be noted that speed of light can be reduced due to impedance of a media.
In the particle theory of light, the light waves come in small packets known as photons. The value of the speed of light in free space is 299,792,458 meters per second. This value can be obtained using several methods. These methods include Romer method, which uses astronomical objects to measure the speed. Several methods measure frequency and wavelength of several light beams separately and use them to calculate the speed of light.