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(a) Arrange the following electromagneti...

(a) Arrange the following electromagnetic waves in the descending order of their wave-lengths:
(i) microwaves (ii) IR rays, (iii) UV radiations (iv) `gamma-`rays
(b) Write one use each of any two of them.

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(a) The given electromagnetic waves in the descending order of their wavelengths are:
Microwaves, IR rays, UV radiations and `gamma-`rays.
(b) Microwaves are used for radar systems, IR rays are used in remote switches, UV radiations are used in water purifiers and `gamma-`rays are used for treatment of cancer.
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U-LIKE SERIES-ELECTROMAGNETIC WAVES-SHORT ANSWER QUESTIONS
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  2. A capacitor, made of two parallel plates each of plate are A and separ...

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  3. Why does a galvanometer show a momentary deflection at the time of cha...

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  4. An electromagnetic wave is travelling in a medium with a velocity vecv...

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  5. How does a charge q oscillating at certain frequency produce electroma...

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  6. (a) Why are infra-red waves often called heat waves ? Explain. (b) W...

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  7. The oscillating magnetic field in a plane electromagnetic wave is give...

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  8. Identify the electromagnetic waves whose wavelengths vary as (a) 10^...

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  9. Identify the electromagnetic waves whose wavelengths lie in the range ...

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  10. Arrange the following electromagnetic radiations in ascending order of...

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  11. Write one method each of (i) production, and (ii) detection of microwa...

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  12. Briefly state the working principle of microwave ovens.

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  13. (a) Give one use of electromagnetic radiations obtained in nuclear dis...

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  14. The following table gives the wavelength range of some constituents of...

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  15. (a) Why do welders wear special glass goggles or face masks with glass...

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  16. How are infrared waves produced ? Why are these referred to as .heat w...

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  17. (a) Arrange the following electromagnetic waves in the descending orde...

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  18. Name the types of electromagnetic radiations which (i) are used in des...

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  19. How does Ampere-Maxwell law explain the flow of current through a capa...

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  20. Considering the case of a parallel plate capacitor being charged, show...

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