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प्रश्न
A wave has wavelength 50Å of State the speed in vacuum.
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उत्तर
The speed of the wave will be 3 × 108 m/s in vacuum.
संबंधित प्रश्न
Define the term dispersion of white light.
As light rays pass from air into a glass prism, are they refracted towards or away from the normal?
What is spectrum? What is the name of glass shape used to produce a spectrum?
Which of the following coloured light has the least speed in glass prism?
(a) violet
(b) yellow
(c) red
(d) green
You are given a disc divided into seven sectors with colours violet, indigo, blue, green, yellow, orange and red in them. What would be its colour when it is rotated rapidly?
- A beam of monochromatic light undergoes minimum deviation through an equiangular prism, how does the beam pass through the prism, with respect to its base?
- If white light is used in the same way as in part (a) above, what change do you expect in the emergent beam?
- What conclusion do you draw about the nature of white light in part (b)?
When a white light ray falls on a prism, the ray at its first surface suffers ______.
Make the correct choice for each of the following:
Which one of the following Fig correctly shows the path of the ray through the glass block?
Write three conditions necessary to obtain a pure spectrum on a screen. Name the instrument in which the conditions stated by you are fulfilled.
State two properties of ultra-violet radiations which differ from visible light.
