Question

Light owes its colour to its-
1) Frequency
2) Velocity
3) Phase
4) Amplitude

Answer 1

Hint:Light is defined as an electromagnetic radiation that moves in undulating patterns of waves. There has been a long battle as to whether the light is a wave or it is a molecular, there are both experiments that prove light as photons and light as a wave.

Complete step by step Solution:
There are many ways to describe light, generally we can describe the light by its colour but there are many ways to express the light in terms of its amplitude, wavelength, frequency, etc. The frequency of light is defined as the number of waves that pass a point in space during a given time interval. The frequency of the visible is what we call the colour of the light. It ranges from 430 trillion hertz as red to 750 trillion hertz seen as violet. The full range of frequencies extends beyond the visible portion to infrared, UV, Gamma, etc.
The frequency of light is given by:

$c = \lambda v$ ;
Where:
c = Speed of light;
$\lambda $= Wavelength of light;
$v$ = Frequency of the light

Here the frequency of light is proportional to the speed of light and inversely proportional to the wavelength of light. The shorter the wavelength of the light the more frequency the light would have and the vice-versa is also true. It is also true that the amount of energy in a light is proportional to its frequency the higher the energy of the light the higher would be its frequency.

Final Answer:Option “1” is correct. Light owes its colour to its Frequency

Note:Here, we need to define light and explain the relation of light with respect to wavelength, frequency and amplitude. Write the formula that relates speed of light, wavelength and frequency. Explain the dependence of colour on the frequency of light and also explain about the relation of its energy with frequency.