Question

p.8.6 waves reassessment
how are a telegraph, a radio satellite, and a wireless computer network related?

○ they are all modern devices that use visible light to send messages across long distances.

○ they are a historical sequence of devices that encode and transmit information using radio wave technology.

○ they are devices from different time periods that all transport matter across short distances.

○ they are all outdated devices that were used to send digital signals using x - ray technology.

Explanation:

• Analyze Option A: Telegraph and radio satellite don't use visible light for messaging, so A is wrong.
• Analyze Option B: Telegraph (historical, used electrical signals/radio - related tech in development), radio satellite, and wireless computer network all involve encoding/transmitting info with radio - wave - based tech (or related electromagnetic wave tech) and represent a historical progression of communication devices.
• Analyze Option C: These devices transmit information, not matter, so C is wrong.
• Analyze Option D: Telegraph isn't digital - signal - based in the same way, and none use X - ray tech, so D is wrong.

Answer:

B. They are a historical sequence of devices that encode and transmit information using radio wave technology.