BPSC – Combined Competitive Examination · প্রশ্ন 15
Heat transfer that does not require a medium is called:
উত্তর দেখান ও ব্যাখ্যা
উত্তর: (A) Radiation
ব্যাখ্যা
Radiation needs no medium, which is how the Sun's heat reaches Earth.
- (A) সঠিক
Correct: radiation travels as electromagnetic waves, even through vacuum.
- (B) ভুল
Wrong: not a mode of heat transfer.
- (C) ভুল
Wrong: needs a material medium (mostly solids).
- (D) ভুল
Wrong: needs a fluid medium.