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प्रश्न
Name the scientist who discovered radio waves
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उत्तर
Marconi
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संबंधित प्रश्न
Name the parts of the electromagnetic spectrum which is
used as a diagnostic tool in medicine.
Write in brief, how these waves can be produced.
Give a reason for the following:
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Give a reason for the following:
It is necessary to use satellites for long-distance TV transmission. Why?
If the earth did not have an atmosphere, would its average surface temperature be higher or lower than what it is now?
Can a hydrogen atom emit characteristic X-rays?
An e.m. wave exerts pressure on the surface on which it is incident. Justify.
One requires 11eV of energy to dissociate a carbon monoxide molecule into carbon and oxygen atoms. The minimum frequency of the appropriate electromagnetic radiation to achieve the dissociation lies in ______.
Why does microwave oven heats up a food item containing water molecules most efficiently?
Which set lists uses of microwaves?
Where does infrared radiation lie relative to visible light?
