(different, frequency, same, spectrum, recombination, velocity,
dispersion, refraction, seperation)
In vacuum, the velocity of light rays of all frequencies is the same. But
the velocity of light in a medium depends on the __________ of light and
thus different colours travel with different __________. Therefore, the
refractive index of a medium is __________ for different colours. Thus,
even when white light enters a single medium like glass, the angles of
refraction are different for different colours. So when the white light
coming from the Sun through air, enters any refracting medium, it
emerges as a __________ of seven colours. The process of __________ of
light into its component colours while passing through a medium is
called the __________ of light.
Answers
Answer:
Sound is a form of energy that gives us the sensation of hearing. Wave is a periodic disturbance produced in a medium. Sound travels in the form of longitudinal waves. SONAR is used to measure the depth of the ocean. Here we will discuss, wave, its types, sound, reflection of sound, sound pollution and its control.
Wave Motion:
Wave is a periodic disturbance produced in a medium. Wave motion is the transfer of energy from one place to another caused by the vibratory disturbance travelling through a medium. A wave motion travels with same speed in all directions. It is a periodic disturbance produced by a vibrating body.
Types of Wave:
On the basis of propagation of waves through material medium, waves are classified into two types:
Mechanical Wave:
The wave which requires material medium for its propagation is called mechanical wave. Examples of mechanical wave are sound waves, water waves, etc.
Electromagnetic Wave:
The wave which does not require material medium for its propagation is called electromagnetic wave. Examples of electromagnetic wave are X-ray waves, light waves, etc.
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Classification of Wave:
On the basis of direction of vibrating particles, waves are classified into two types:
Transverse Wave:
Transverse Wave is such type of wave in which the energy is transferred perpendicular to the direction of propagation of the motion of the wave. In this type of wave, crests and troughs are seen. Examples of transverse waves are: light wave, water wave, etc.
Longitudinal Wave:
Longitudinal wave is such type of wave in which the energy is transferred along the direction of propagation of the wave. In this type of wave, compression and rarefaction are seen. Examples of longitudinal waves are: sound wave, ultrasound waves, etc.
Some Important Terms Related to Wave:
Amplitude: The maximum distance travelled by a vibrating particle from its mean position is called amplitude. Its SI unit is metre (m).
Wavelength: The distance between any two consecutive crests or troughs or compression or rarefaction is called wavelength. Its SI unit is metre (m).
Frequency: The number of happenings of complete cycles made in one second is called frequency. Its SI unit is Hertz (Hz).
Sound:
Sound is a form of energy that gives us the sensation of hearing. All the objects that can produce sound are called the sources of sound. Sound is produced due to the vibration of the particles of a body. It is a longitudinal wave. Some sources of sound are loudspeakers, headphones, etc.
Answer:
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