## HW 1.7 6th Edition Part B

$c=\lambda v$

Posts: 64
Joined: Fri Sep 28, 2018 12:26 am

### HW 1.7 6th Edition Part B

1.7 (a) The frequency of violet light is 7.1 " 1014 Hz. What is the wavelength (in nanometers) of violet light? (b) When an electron beam strikes a block of copper, x-rays with a frequency of 2.0 " 1018 Hz are emitted. What is the wavelength (in picometers) of these x-rays.

The answer for part b in the book is 150 nm, but the question says to convert to picometers. I think the nm in the book is a typo and it should be 150 picometers instead.

Isabel Bellon 4F
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Joined: Fri Sep 28, 2018 12:27 am

### Re: HW 1.7 6th Edition Part B

Agreed, that's what I put as my answer as well

2c_britneyly
Posts: 62
Joined: Fri Sep 28, 2018 12:16 am

### Re: HW 1.7 6th Edition Part B

Same, I solved it and ended up with 150 picometers too.