Light Dispersion and Optical Phenomena

White light is made up of seven colors namely Violet, Indigo, Blue, Green, Yellow, Orange, Red commonly remembered by using the acronym VIBGYOR. 

When white light splits into different colors with different wavelengths then it is known as dispersion.

''Clouds are white because of light scattering off of water droplets''.  It is true as reflection is also scattering but in a defined way.

The splitting of white light into its constituent colour is called dispersion. Dispersion occurs because refraction or bending differs with the colour.

Dispersion occurs because the refractive index of a medium depends on the wavelength of light. Since refractive index is related to the speed of light in the medium (n = c/v), different wavelengths travel at different speeds, causing them to deviate by different amounts.

White light is incident combination of various colours each having different wavelengths. 

The splitting of white light into its seven constituent colors when passing through a prism is known as dispersion. Refraction is the bending of light, and the spectrum is the resulting band of colors.

The phenomenon due to which white light splits into seven colours on passing through a prism is called dispersion. White light is made up of seven bands of colors each having different wavelengths. Upon passing through a medium, each of the colors travels at different speeds and hence has different angles of refraction leading to the splitting of the light i.e. dispersion.

False. It is formed only after or before the rains when the air is full of moisture

A ray of light after passing through a medium were spread up into different colours. The phenomenon is called dispersion.

Answer is D.

The sky appears blue due to dispersion and scattering of white light from the Sun and the blue color scatters the most because of its small wavelength as compared to other colors in spectrum.

The prism splits the incident light beam into a band of 7 colors. This band of colored components of a light beam is called its spectrum and the phenomenon of splitting of light into its component colours is called dispersion.

When light falls on the glass prism, refraction takes place. Since the wavelength of different components of light is different and the frequency is constant, each component gets deviated by a different angle due to the difference in velocity in the glass medium. The red color having the maximum wavelength and velocity, deviates the least and forms the upper part of the spectrum whereas violet having the least wavelength and velocity deviates the most.

The primary colors of pigment are used when producing colors from reflected light; for example, when mixing paint or using a color printer. The primary colors of pigment are Magenta, Yellow, and Cyan. 

Hence, the correct answer is OPTION B.

The splitting of white light into its constituent colour is called dispersion of light. In this phenomenon, different colours contained in white emerge from the glass prism in different directions due to their different wavelengths.

According to Cauchy's dispersion formula, the refractive index is higher for shorter wavelengths (blue) than for longer wavelengths (red). Consequently, blue light deviates more than red light when passing through a prism.

Dispersion occurs because the refractive index of the prism material varies with the wavelength of light. This causes different wavelengths to travel at different speeds and refract at different angles.

Thin film interference, which causes the colors seen on oil slicks, requires the thickness of the film to be comparable to the wavelength of visible light. Visible light wavelengths are in the range of hundreds of nanometers, or 10^-7 to 10^-6 meters.

Red light has the longest wavelength in the visible spectrum, which results in the lowest refractive index and the minimum deviation (dispersion) when passing through a prism.

Colours are often observed as light passes through a triangular prism. Upon passage through the prism, the white light is separated into its component colours - red, orange, yellow, green, blue and violet. The separation of visible light into its different colors is known as dispersion.

A rainbow
is a meteorological phenomenon that is caused by reflection, refraction
and dispersion of light in water droplets resulting in a spectrum of
light appearing in the sky.

Now I won't get scientific, but apply your logic here.

Light
which is reflected comes from the sun. So, rainbow is basically
reflecting the light of the sun back. So think, how can you reflect
something by staying at the same side as of the object you want to
reflect?

The phenomenon of splitting of white light into seven constituent colors is known as dispersion.

Upon entry of white light at the first boundary of a triangular prism, there will be a slight separation of the white light into the component colours of the spectrum. Upon exiting the triangular prism at the second boundary, the separation becomes even greater and ROYGBIV is observed in its splendor. Hence, Dispersion of white light into its constituent colours occurs during refraction at the boundary of a transparent medium.

Upon entry of white light at the first boundary of a triangular prism, there will be a slight separation of the white light into the component colours of the spectrum. Upon exiting the triangular prism at the second boundary, the separation becomes even greater and ROYGBIV is observed in its splendor. Hence, Dispersion of white light into its constituent colours occurs during refraction at the boundary of a transparent medium.

As a light source, we will use a mercury lamp, which emits light at several discrete wavelengths. The device we are using is called a prism spectrometer because, once the prism is calibrated, it can be used to measure the wavelengths of the lines in the spectra produced by various atoms.

A cloth piece looks red in sun light because it absorbs all the colours of sun light except red, red is reflected to our eyes.

Red goes through least deviation because it has highest speed among VIBGYOR.

Violet is having shortest wavelength among VIBGYOR. 

Violet undergoes maximum deviation while passing through a prism because it has least wavelength , as we know,

Violet have least wavelength among the visible light spectra.

Yes, speed becomes different for different wavelengths in a particular medium. In a given dispersive medium the speed for different colours is different and due to this phenomenon we can see the spectrum of VIBGYOR.

In vacuum all the colours have same velocity but their velocity changes when they enter in a medium. In the medium their velocity changes due to change in their wavelength.
$v=n\lambda $
If $\lambda $ changes, v also changes for a particular colour therefore, different colours have different wavelength ($\lambda $).

When white light pass through a
glass prism the white light get scatter in so many colours of light
according to it's frequency and the lights are (VIBGYOR) ,this phenomena of scattering of light is called
dispersion of light.

Refraction is a phenomenon that happens when a beam of white light
passes through the interface between air and a denser medium, such as
glass or water. Light travels more slowly in a denser medium, so it
changes direction – or refracts – when it passes through the interface.
White light is a mixture of all the wavelengths of light, and each
wavelength refracts at a slightly different angle. Therefore, when the
beam emerges from the denser medium, it has been split into its
component wavelengths. The ones you can see form the familiar rainbow

Red colour having minimum refractive index and hence undergoes minimum deviation.

Violet colour having higher refractive index and hence undergoes maximum deviation.

Newton was the first to understand that white light consists of a mix of light rays, each with a different colour.

$\text{Defination of Dispersion :-}$