The wavelength of ultraviolet radiation is 400nm. If the speed of light in air is 3 x 10\(^8\)ms\(^{-1}\), then the frequency of the ultraviolet radiation is

ohirocaesar

9 years ago

To convert nm to m is 1 x 10-9

Greatestt

7 years ago

Wrong answer!
1 Nm = 1 × 10^-9

regony600

9 years ago

You guys are wrong.

frequency =velocity /wavelength

f=(3*10^8)/(400*10^-9)

f=7.5*10^14(d)

joshuaterwase123

7 years ago

Speed=displacement/time
Time=1/Frequency,F Hence Speed=displacement*Frequency
(400*10^-9)*F=(3*10^8)
F=(3*10^8)/(400*10^-9)
=7.5*10^14

kennyoye05

4 months ago

Can you explain it

toopretty

1 year ago

I don't think the selected answer is correct because 3 divided by 400 will give you 0.0075 not 75

morenikeji2016

9 years ago

The selected answer is wrong:

nm=10 raise to power-9m

REF: Senior Secondary physics by okeke.p.n
page 1, table 1.2

Pr0digy

10 years ago

Wrong formula!......its V= F^ theirfore, F=V/^......the answer is B