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first did you get the wavelength of ultraviolet rays ?

no i was going with 1000 x 10^-10 but thats not right.

you are right !

thats all i do?

now just ensure you report answer in scientific notation

ie in the form
\[a \times 10^b\]

|dw:1359548779460:dw|

i have just use the scientific notation form

so i dont have to solve it? and @manishsatywali why +3 to the exponent?

I HAVE USED THE PROPERTY : M ^n * M ^ b = M ^(n+b)

???

here M = 10 and n = 3 , b = -10

did u get that ?

whats the n for?

n = 3

10^3 * 10^(-10)

but why do you need 10^3? where does it come from in the problem?

1000 = 10 ^3

wouldnt that be 1 x 10^3?

\[10^3=1 \times 10^3\]

so thats how i get the -10+3?

yup

yep :)

now u understand what i was trying to say

so it would be (1 x 10^-10)(1 x 10^3) ? which simplifies to 1 x 10^-7?

right?

yes u got it

ok :) thanks.