Question : The splitting of white light into its component colours is called ______.
Option 1: refraction
Option 2: reflection
Option 3: scattering
Option 4: dispersion
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Correct Answer: dispersion
Solution : The correct answer is dispersion.
The splitting of white light into its component colours is called "dispersion". This phenomenon occurs because different colours of light have different wavelengths, and when light passes through a prism or a similar optical element, it gets separated into its constituent colours, creating a spectrum. The spectrum has seven colours. The order of colours in a typical spectrum, from longest to shortest wavelength, is red, orange, yellow, green, blue, indigo and violet.
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Question : The splitting of white light into its components is due to:
Option 1: reflection
Option 2: refraction
Option 3: transmission
Question : A periscope works on the principle of:
Option 2: total internal reflection
Option 3: diffraction
Option 4: reflection
Question : A light ray travelling from denser to rarer medium at an angle of incidence more than the critical angle of the concerned media pair suffers:
Option 4: total internal reflection
Question : The colour of the alluvial soil varies from _______.
Option 1: pale white to warm white
Option 2: light orange to dark orange
Option 3: orange to red
Option 4: light grey to ash grey
Question : What is the greenhouse effect?
Option 1: Turning of house green because of algae cover
Option 2: Turning of house green because of the green component of white light
Option 3: Warming of the Earth because of trapping of radiations by the Earth's atmosphere
Option 4: None of these
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