Question

Plz Help Me

What is the wavelength of waves that have a frequency of 2.20 x 10−4 Hz?

A.) 7.30 x 10−13 m
B.) 6.60 x 104 m
C.) 5.50 x 108 m
D.) 1.36 x 1012 m

Answer 1

Answer:- The wavelength is
`1.36*10^1^2m` and the right option is D.

Solution:- Wavelength is inversely proportional to the frequency and the equation is:

`\lambda =(c)/(\\u )`

where,
`\lambda` is the wavelength, c is the speed of light and
`\\u` is frequency.

Frequency is
`2.20*10^-^4Hz` and the speed of light is
`3.00*10^8(m)/(s)` .

Since,
`1Hz=1s^-^1`

So,
`2.20*10^-^4Hz=2.20*10^-^4s^-^1`

Let's plug in the values in the equation:

`\lambda =(3.00*10^8m.s^-^1)/(2.20*10^-^4s^-^1)`

`\lambda =1.36*10^1^2m`

Hence, the right option is D)
`1.36*10^1^2m` .