在线名词解释大全 - 物理与人类未来 - 详细

Hertz’swaveshadafrequencyof10^9hertz.Couldanormalhomeradioreceivewavesofthistypeandfrequency?赫兹波的频率为10^9Hz.一台普通的家用收音机能收到这种类型和频率的波吗?

A
A.No, because radios receive only sound waves, and Hertz created only electromagnetic waves不能,因为收音机只能接受声波,赫兹是电磁波
B
B.No, because these waves are neither in the AM radio frequency range nor the FM radio frequency range不能,因为这些波不在调幅和调频收音机的频段内
C
C.Yes, these waves could be received by an AM and FM radio.能,因为这些波在调幅和调频收音机的频段内
正确答案:
(b)10^9Hz=1000MHz,不在任何收音机的刻度盘上
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