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प्रश्न
Suggest one way, in each case, by which we can detect the presence of Infrared radiations.
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उत्तर
These are detected by a thermopile.
संबंधित प्रश्न
State the cause of dispersion of white light
What acts as tiny prisms in the formation of a rainbow?
Out of the following, the colour of light having the maximum wavelength is:
(a) violet
(b) indigo
(c) green
(d) orange
How does the speed of light determine the optical density of a medium?
An object is placed in front of a converging lens and in front of a diverging lens as in fig.
(a)Complete the ray diagram to obtain an image.
(b)Compare the nature of image formed by both the lenses in the above case.
A wave has wavelength 50Å of name the wave.
A student has to trace the path of a ray of light through a glass prism. List four precautions he should observe for better results.
Observe the given figure and write appropriate phenomenon of light in the box.
What is dispersion? Explain in detail.
What is Newton’s disc?
