Question

calculate the wavelength of a photon of blue light whose frequency is 6.3 x 10^14

Answer 1

\(\lambda*\nu=c\)

Answer 2

so if you wanna find the wavelength you arrange the equation: \(\lambda=\dfrac{c}{\nu}\)

Answer 3

okay so I plugged the numbers into that equation but it came out as .000000045. am I allowed to which the v and c?

Answer 4

@aaronq

Answer 5

c is the speed of light, \(\lambda\) is wavelength,and \(\nu\)i is frequency.

Answer 6

yes I am aware of that but my answer is not coming out correct. so what am I doing wrong?

Answer 7

um im not sure maybe you're plugging incorrectly into your calc

i got 0.00000047586104444 or \(4.76*10^{7}\)

Answer 8

meters

Answer 9

okay let me try again but when I first did it just gave me a decimal no time 10 with a power

Answer 10

damn i missed the eve sign \(4.76∗10{^-7}\)

Answer 11

i think they it expressed in nanometers

Answer 12

want it*

Answer 13

what?

Answer 14

oh how do I express it in nanometers

Answer 15

1 nm = \(1.0*10^{-9}\) m

convert from m to nm: \(\dfrac{4.76*10^{-7}m}{1.0*10^{-9}m/nm}\)

Answer 16

my calculator says 0.000000476 I don't have a times 10^-7

Answer 17

the exponent tells you how many spaces the decimal point moves

\(0\underbrace{.0000004}\color{red}.76\)

Answer 18

so when you divide you should get 476 nm

Answer 19

but my calculator usually gives me the whole scientific notation thing. why didn't?

Answer 20

i don't know lol maybe you need to press another button?

Answer 21

haha theres too many buttons on here...idk which one to push!!

Answer 22

i hate graphing calculators loll i like http://web2.0calc.com other than my $10 calc.

Answer 23

I don't think its a graphing....but idk I got it $9

Answer 24

hm i would use wolfram.. or get a new calculator that works lol

Answer 25

it said on the calculator you gave me totoo....but its fine im just going to ask my teacher tomorrow. thank you for your help :)

Answer 26

no problem !