Advertisements
Advertisements
प्रश्न
The speed of light in air or vacuum is
पर्याय
3 × 108 M s-1
2.25 × 108 m s-1
332 ms-1
2.0 × 108 ms-1
उत्तर
3 × 108 M s-1
APPEARS IN
संबंधित प्रश्न
Describe an activity to show that colours of white light splitted by a glass prism can be recombined to get white light by another identical glass prism. Also draw ray diagram to show the recombination of the spectrum of white light.
What is spectrum? What is the name of glass shape used to produce a spectrum?
Which is optically denser: water or air? Give reason
How can the presence of ultraviolet radiation be detected?
Write the range of wavelength of the ultraviolet spectrum.
In the figure, a beam of light consisting of three colours blue, red, and yellow is incident on a prism and on a rectangular glass block respectively. Complete the diagram by drawings of the refracted and emergent rays.
Rainbow is a beautiful natural phenomenon. It is the combined effect of a natural three processes together produced by light. Write it into the circle.
Say TRUE or FALSE
After passing through a prism, white light splits into a band of seven colours
Name the scientist who was the first to use a glass prism to obtain the spectrum of sunlight.
Assertion: We can see the rainbow in the sky when the rain starts falling after a spell of bright sunlight.
Reason: The rainbow is formed due to the dispersion of light.
