Question

Can someone answer these?

Answer 1

Nine

Basically you are using d = r * t

Frequency is 1 / t

d is more commonly represented by lambda (
`\lambda`). Lambda is the wavelength.

so the formula
`\lambda` = c / f

More commonly it is written as
`\lambda`*f = c.

Givens

c = 3*10^8 m/s

`\lambda` = 0.1 nm = 0.1 nm *[1 m /1 * 10^9 nm] = 0.1 * 10^ - 9 meters.

f = ??

f =
`(3*10^8)/(0.1 * 10^-9)`

f = 3 * 10^8 * 10^9 / 0.1 = 3 * 10^18

Answer: C

Ten

`\lambda` = c/f

`\lambda` = 3*10^8 / 1 * 10^16

`\lambda` = 3*10^-8 meters

`\lambda` = 30 * 10^-9 meters = 30 nm

Answer: D