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What is the term for the band of colours produced when light is dispersed?
Absorption
Refraction
Spectrum
Reflection
Spectrum
The term for the band of colours produced when white light is split into its constituent spectral components is known as a spectrum. This phenomenon, known as dispersion, occurs because light rays of different wavelengths travel at different speeds through a refractive medium.
The term for the band of colours produced when white light is split into its constituent spectral components is known as a spectrum. This phenomenon, known as dispersion, occurs because light rays of different wavelengths travel at different speeds through a refractive medium.
Think of it like a crowd of people running through a hallway; those who are shorter might dart through gaps faster than those who are taller, resulting in the crowd spreading out based on their size.
VIBGYOR (Violet, Indigo, Blue, Green, Yellow, Orange, Red) to remember the sequence of colors in the spectrum.
n(╬╗)=A+╬╗2BтАЛ тАФ Cauchy's formula relating refractive index to wavelength
╬┤=(nтИТ1)A тАФ Deviation formula for a thin prism
Dispersion occurs when white light passes through a transparent medium like a glass prism. The refractive index of the medium is wavelength-dependent, represented by Cauchy's equation. Consequently, violet light (having the shortest wavelength) bends the most, while red light (having the longest wavelength) bends the least, separating the light into the visible spectrum.
Dispersion is the separation of white light into its component colors.
The visible spectrum ranges approximately from 380nm to 750nm.
Isaac Newton was the first to demonstrate that white light is composed of a spectrum of colors.
Enables spectroscopy for chemical analysis
Allows for the study of stellar compositions
Chromatic aberration in optical lenses
Loss of signal clarity in communication fibers due to dispersion
Formation of rainbows in the atmosphere
Identification of elements via atomic emission spectra
Option A (Absorption) refers to the process where light energy is taken up by matter.
Option B (Refraction) is the bending of light as it passes from one medium to another.
Option D (Reflection) is the bouncing back of light from a surface.
C is correct тАФ The band of colours produced by the dispersion of light is called a spectrum.
In competitive exams, remember that violet light undergoes the maximum deviation and has the highest refractive index, whereas red light undergoes the minimum deviation.
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