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Welders wear special glass goggles ro fa...

Welders wear special glass goggles ro facemask with glass window to protect their eyes from

A

Gamma rays

B

X-ray

C

Intered

D

UV-radiations

Text Solution

Verified by Experts

The correct Answer is:
D
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AAKASH INSTITUTE-ELECTROMAGNETIC WAVES-ASSIGNMENT (SECTION-A)(OBJECTIVE TYPE QUESTIONS (ONE OPTIONE IS CORRECT)
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  2. The part of electromagnetic spectrum referred as heat wave is

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  4. The momentum carried by E-M waves in vaccum is P, then energy associat...

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  5. The essential distinction between X - rays and gamma - rays is that

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  7. The dimensional formula mu(0)epsilon0 is

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  8. An electromagnetic wave consists of oscillating electric and magnetic ...

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  9. Which of the following radiation has the least wavelength?

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  10. The speed of em wave in the unit of 10^8m//s, in a medium of dielectri...

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  11. Which component of electromagnetic wave primarily intracts with mediu...

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  12. The ratio of contributions made by the eletric field and magnetic fiel...

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  13. Which of the following is correct ? (symbols have their ususal meaning...

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  14. Which of the following is a green house gas

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  15. Which of the following is correct about microwave oven?

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  16. Which gas prouduced by the welding arcs are harmful the eyes ?

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  17. The magnetic field in a plane electromagnetic wave is given by B(y) ...

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  18. Thermoplies are used for the detection of

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  19. The bombardent of high energy electrons on a metal target of high atom...

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