Question

What is the frequency of a 1.78 × 10^-15 J wave?

Answer 1

`\huge{ \boxed{2.69 \: * {10}^(18) \: Hz}}`

Step-by-step explanation:

The frequency of the wave can be found by using the formula;

`f = (E)/(h)`

where;

E is the energy in J

f is the frequency in Hz

h is the Planck's constant which is

6.626 × 10-³⁴ Js

From the question

E =
`1.78 * {10}^(-15) \: J`

`\therefore \: f = \cfrac{1.78 * {10}^( - 15) }{6.626 * {10}^( - 34) } \\ = 2.69 * {10}^(18) \: Hz`