Visible light takes 1.3 s to travel from earth to the moon. How long will a radio wave, with a wave length of 200 m takes to travel to and for the moon from the earth? (Distance of moon from earth = 3.9 x 108 m)

Question

nottim · Answer

t=1.3s
lambda=200m

anonymous · Answer

that's all ?

anonymous · Answer

lol is this a trick question?

nottim · Answer

no. iwas giving the variables....

anonymous · Answer

okay :) please carry on

nottim · Answer

what formula do you think applies here?

nottim · Answer

oh. d=3.9 x 108 m)

anonymous · Answer

V = frequency multiply wavelength

anonymous · Answer

then there is the distance formula

anonymous · Answer

i dont know what to do

nottim · Answer

i guess you could use both formulas in a 2-step formula

anonymous · Answer

how???

nottim · Answer

err....i dunno. im studying bio rite now. physics stuff isnt out...

nottim · Answer

remember the constant for the speed of light.

anonymous · Answer

i give you 4 options please choose the most appropraite answer

anonymous · Answer

A.
2.6 s 

B.
5.2 s 

C.
1.3 s 

D.
3.9 s

nottim · Answer

i hope im not answering a quiz

anonymous · Answer

yes you are.

nottim · Answer

lol

nottim · Answer

at the very least, you're honest

anonymous · Answer

Alright the option is now left with A , B and C

anonymous · Answer

1/3 probabilty of getting it right

anonymous · Answer

I believe C is not an option since you said you were listing the variables.

anonymous · Answer

Hence, i am now left with either option A or option B

vincent-lyon.fr · Answer

The good question is: what is a radio wave? What is light?