Tag: fibre optics basics
Questions Related to fibre optics basics
Dispersion of white light into its constituent colours occurs during :
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Reflection at a plane mirror
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Reflection at a concave mirror
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Internal reflection inside a spherical drop of water
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Refraction at the boundary of a transparent medium
Answer is D.
The splitting of white light into several colours on passing through a glass prism is due to
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refraction
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reflection
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dispersion
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none of these
$ \bf{Reflection} $ is the phenomenon in which light rays on striking a polished surface(such as a mirror) bounce back or are sent back into the same medium.
$\bf{Dispersion} $ is the phenomenon of splitting of white light into its component colours (VIBGYOR) on passing through a glass prism.
The sky appears blue due to:
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reflection of light
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dispersion and scattering of light
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total internal reflection of light
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blue colour of water droplets
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 splitting of white light into its colored components is called _____.
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Spectrum
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Dispersion
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Deviation
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Refraction
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 white light passes through a dispersive medium, it breaks up into various colours. Which of the following is true?
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Velocity of light for violet is greater than the velocity of light for red colour
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Velocity of light for violet is less than the velocity of light for red
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Velocity of light is the same for all colours
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Velocity of light for different colours
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.
Which of the following are Primary pigments ?
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Yellow, green, magenta
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Magenta, yellow, cyan
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Blue, green, yellow
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Blue, green, violet
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.
Which of the following are Primary colors ?
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Red, blue, yellow
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Red, orange, yellow
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Red, blue, green
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Red, green, cyan
Why do we study the Dispersion phenomenon using a glass prism and not a glass slab ?
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Light doesn't undergo any deviation inside a glass slab; so cannot be used to study Disprsion
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All of the dispersion that takes place at the first interface is exactly reversed at the second parallel surface, 'undoing' the effect of the first interface.
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Dispersion occurs only in prism and not in glass slab
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None of the above
Dispersion of light is caused due to :
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intensity of light
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density of medium
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wavelength
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none of the above
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.
A ray of light containing both red and blue colours is incident on the refracting surface of a prism. Then,
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both colours suffer equal deviation
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red colour suffers more deviation
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red colour suffers less deviation
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deviation depends on the angle of prism