Smartphone and the type of wave?

[Betadine]

Homework Statement

A person speaks into a smartphone.

What type of wave does the smartphone receive?


2. The attempt at a solution

I thought the answer is longitudinal wave. Is that right?

Or does the smartphone receive radio waves?

 

[mfb]

I thought the answer is longitudinal wave. Is that right?

A longitudinal wave of what?

Or does the smartphone receive radio waves?

Do you "speak" with radio waves?

Note that those two things belong to completely different concepts.

 

[Betadine]

A longitudinal wave of what?

Do you "speak" with radio waves?

Note that those two things belong to completely different concepts.

Dear Sir, thank you for the reply and clarification.

The actual question is as follows:
David switched on his television set and radio. As he was resting, he received a phone on his smartphone. He picked it up and began talking over the phone.
In the above situation, how many of the devices are receiving signals in longitudinal wave?

Could you please kindly help me with the question?

 

[mfb]

Sure. What did you find out so far?

 

[Betadine]

Sure. What did you find out so far?

I found out that sound waves are longitudinal waves; radio waves are transverse waves.

My thinking is that as the boy speaks into the phone, sound waves are transmitted into the phone.

So my guess is that the phone is receiving longitudinal waves?

 

[mfb]

I found out that sound waves are longitudinal waves; radio waves are transverse waves.

Good.

My thinking is that as the boy speaks into the phone, sound waves are transmitted into the phone.

So my guess is that the phone is receiving longitudinal waves?

Sure

 

[Betadine]

Good.

Sure

Thank you!