1) _____ waves are used for communication more than other electromagnetic waves because of their large wavelengths. a) gamma b) radio c) microwave d) ultraviolet 2) _______ waves have the second lowest frequency on the EM spectrum and are used for cell phones and for heating food. a) radio b) UV c) microwaves d) visible light 3) Which type of signal is more reliable? a) digital b) analog 4) Which signal is more precise? a) digital b) analog 5) Cell phones, streaming music, Wi-fi a) digital b) analog 6) Record players and cassette tapes,  a) digital b) analog 7) Which electromagnetic wave has the greatest frequency and energy? a) gamma b) radio c) microwave d) visible light 8) What is the only part of the electromagnetic spectrum that we can see? a) gamma b) radio c) microwave d) visible light

Wireless Wave Communication

สั่งพิมพ์
ฝัง

ลีดเดอร์บอร์ด

สไตล์ภาพ

ตัวเลือก

สลับแม่แบบ

คืนค่าการบันทึกอัตโนมัติ: ใช่ไหม