Dispersion of Light
Physics ⇒ Light and Optics
Dispersion of Light starts at 8 and continues till grade 12.
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See sample questions for grade 11
Describe how dispersion leads to the formation of a rainbow in the atmosphere.
Describe the role of refractive index in the dispersion of light.
Explain why a prism causes dispersion of white light but a glass slab does not.
Explain why the sky appears blue during the day and reddish at sunrise and sunset, relating your answer to dispersion.
A prism has a refracting angle of 60°. If the angle of minimum deviation for green light is 40°, calculate the refractive index of the prism for green light.
If a beam of white light is passed through a prism and then through an identical inverted prism, what will be observed?
If the refractive index of glass for red light is 1.514 and for violet light is 1.532, which color bends more in the prism?
If the speed of red light in glass is 2.00 × 108 m/s and the speed of violet light is 1.95 × 108 m/s, which color has a higher refractive index?
The angular separation between two colors in a spectrum depends on:
(1) The material of the prism
(2) The angle of the prism
(3) The wavelength difference between the colors
(4) All of the above
The phenomenon responsible for the formation of a rainbow is:
(1) Reflection
(2) Refraction
(3) Dispersion
(4) Both refraction and dispersion
Which of the following colors of visible light is deviated the most when white light passes through a glass prism?
(1) Red
(2) Green
(3) Blue
(4) Violet
Which of the following is NOT a result of dispersion of light?
(1) Formation of a rainbow
(2) White light passing through a prism
(3) Shadow formation
(4) Colors seen in soap bubbles
Fill in the blank: The phenomenon of splitting of light into its component colors is observed in a __________ (natural phenomenon) after rain.
Fill in the blank: The refractive index of a medium is __________ for violet light than for red light.
Fill in the blank: The separation of colors in a spectrum is due to the dependence of refractive index on __________.
The difference in the refractive indices of a material for different wavelengths is called __________.
True or False: All colors of white light travel at the same speed in a vacuum.
True or False: Dispersion can only occur in prisms and not in other transparent materials.
True or False: Dispersion of light can be observed in both solids and liquids.
True or False: Dispersion of light is responsible for chromatic aberration in lenses.
