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Assertion : A laser beam 0.2 W power can...

Assertion : A laser beam `0.2 W` power can drill holes through a metal sheet, whereas `1000 W` torch-light cannot.
Reason : The frequency of laser light is much higher than that of torch light.

A

Statement - 1: is true ,Statement - 2: is true ,Statement - 2: is correct explanation of statement - 1,

B

Statement - 1: is true ,Statement - 2: is true ,Statement - 2: is not a correct explanation of statement - 1,

C

statement - 1 is correct and statement - 2 is false

D

statement - 1 is false and statement - 2 is true

Text Solution

Verified by Experts

The correct Answer is:
c
A laser beat is a beam of light which is light amplification by stimulated emission of radiation. The energy per unit area of the laser beam is very hight as compared on the torch light. Here statement - 2 is wrong
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PRADEEP-CURRENT ELECTRICITY-Exercise
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  10. An unknown resistance R(1) is connected is series with a resistance of...

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  11. A uniform wire resistance 20 Omega having resistance 1 Omega is ben...

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  12. The drift velocity of electron in a metal conductor under effective o...

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  13. The drift velocity of electron in a metal conductor under effective o...

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  14. Resistivity of the meterial in independent of

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  15. The SI unit of cunductivity is

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  17. The electric field in the copper wire of area of cross - section 2mm^...

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