BPSC – Combined Competitive Examination · வினா 15
Heat transfer that does not require a medium is called:
விடையைக் காட்டு & விளக்கம்
விடை: (A) Radiation
விளக்கம்
Radiation needs no medium, which is how the Sun's heat reaches Earth.
- (A) சரி
Correct: radiation travels as electromagnetic waves, even through vacuum.
- (B) தவறு
Wrong: not a mode of heat transfer.
- (C) தவறு
Wrong: needs a material medium (mostly solids).
- (D) தவறு
Wrong: needs a fluid medium.