I did come up with answer but the test said it wrong. Help me here. Wireless Numericals

Question

Quoted Question:

One of the large unlicensed bands used for 802.11b WiFi is 2.4GHz. What is the length of these waves? Answer in feet.

Comments

is answer =0.42??

Answer 1

we can calculate wave length by using formula λ = c/ frequency , where c is velocity of light in vaccum.

Please recheck with units and conversions if required

Comments

You are right, but the speed at which radio waves travel in vaccum is different than at which they travel in air.

I think that might have made your answer wrong.