Question

Please help its a chem question

An infrared wave is measured to have a wavelength of 5.6 x 10^4 nm. What is its frequency?

Answer 1

for electrromagnetic radiation (in a vacuum)
\[ c = f\lambda
\\ \
\\ c = \ \textrm{speed of light} = 3.0 x 10^8 m/s
\\ f = \ \textrm{frequency in Hertz (1/s)}
\\ \lambda = \ \textrm{wavelength (in meters)} \]

Answer 2

@AllTehMaffs alright it would be f = frequency I need help solving it

Answer 3

\[ f = \frac{c}{\lambda} \]

what's your wavelength in meters?

Answer 4

5.4 x10^12

Answer 5

@AllTehMaffs

Answer 6

... no. should be very small

Answer 7

I'm not sure than @AllTehMaffs

Answer 8

5.6x10^4 nm

56000nm ( 1x 10^-9)m/nm = 5.6x10^-5 m

Answer 9

oo ok thank you could you help me with one more? @AllTehMaffs

Answer 10

sure ^^ Did you finish that one? c / that number?

Answer 11

Almost all commercially available microwave ovens employ radiation with a frequency of 2.45 x 109 Hz. Calculate the wavelength of this radiation.

Answer 12

@AllTehMaffs yes I got 1.7857143e-13

Answer 13

that's really, really small. It should be pretty large. did you divide that number by c instead? it should be about 10^12

Answer 14

or it should be 10^13

Answer 15

not -13

Answer 16

yes I did c and thats what I got

Answer 17

@AllTehMaffs

Answer 18

(3 x 10^8 / 5.6 x 10^-5) = 5.36 x 10^12 1/s

I'm so sorry, that's what you got originally. I couldn't tell what thing you were talking about without units

Answer 19

its fine haha @AllTehMaffs

Answer 20

^^ what's your next question?

Answer 21

Almost all commercially available microwave ovens employ radiation with a frequency of 2.45 x 109 Hz. Calculate the wavelength of this radiation.

@AllTehMaffs

Answer 22

same deal as last time, this time it's

c/f

Answer 23

ok than you I understand now

Answer 24

welcome ^^ .122m yah?