The Doppler effect is the change of the received frequency of a wave when source and receiver move relative to each other: the received frequency is higher than the emitted frequency while they approach, lower while they recede, and equal to only while their distance momentarily stops changing.
বইগুলো এখনো বাংলা ভাষায় পাওয়া যায় না — ইংরেজি সংস্করণ দেখানো হচ্ছে।
Physics · পরিভাষা