Final answer:
The statement is false; the observed frequency doesn't become infinite when the source moves at the speed of sound, but it leads to a higher frequency due to wave compression.
Step-by-step explanation:
The statement that 'the observed frequency becomes infinite when the source is moving at the speed of sound' is false. The concept being described here is related to the Doppler effect, which is the change in frequency of a wave in relation to an observer who is moving relative to the wave source.
When the source moves at the speed of sound, the waves pile up and create a sonic boom. However, the observed frequency does not become infinite; instead, the waves in front of the source are compressed, leading to a higher frequency, but not an infinite frequency.
True. Baud rate is the number of symbols transmitted per second, not the number of bits. A symbol can represent multiple bits, depending on the modulation scheme used. For example, in a modulation scheme where each symbol represents 4 bits, a baud rate of 1000 symbols per second would transmit 4000 bits per second.