Physics
The wavelength at which the peak of intensity of blackbody radiation occurs

Does not follow any pattern as temperature changes
Increases with increase in temperature
Decreases with increase in temperature
Is the same at all temperatures

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Physics
Scalar Quantities are

Physical quantities which have magnitude only and direction
Physical quantities which have no magnitude only and only direction
Physical quantities which have magnitude only and no direction
Physical quantities which have no magnitude and no direction

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Physics
Light houses are places with powerful lights to :

Guide and resolve traffic jams in crowded metro-cities during nights
Indicate to the incoming warships, the location of a harbour during night
Guide and help large crowds at religious gathering during nights
Guide and warn the ships coming from different directions in the ocean

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