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प्रश्न
Suggest one way, in each case, by which we can detect the presence of Infrared radiations.
उत्तर
These are detected by a thermopile.
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संबंधित प्रश्न
A narrow beam PQ of white light is passing through a glass prism ABC as shown in the diagram.
Trace it on your answer sheet and show the path of the emergent beam as observed on the screen DE.
(i) Write the name and cause of the phenomenon observed.
(ii) Where else in nature is this phenomenon observed?
(iii) Based on this observation, state the conclusion which can be drawn about the constituents of white light.
As light rays emerge from a glass prism into air, are they refracted towards or away from the normal?
Make two diagrams to explain refraction and dispersion.
What is a rainbow? What are the two conditions necessary for the formation of a rainbow in the sky?
How can the presence of ultraviolet radiation be detected?
Draw a neat and labelled diagram for dispersion of light.
Observe the given figure and write appropriate phenomenon of light in the box.
The splitting of white light into its component colours is called ____________.
Which one of the following is involved for the formation of rainbow in the sky?
