Question
Why does a black board appears black in colour?
Asked in SSC CGL · 2017
Reflection and Absorption of Light · Physics
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The SI base units include metre, kilogram, second, ampere, kelvin, mole and candela.
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Famous Discoveries, Laws & Nobel Prizes in Physics has appeared in 44 previous-year exam questions, most frequently in State PSC, UPSC and SSC.
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