Question

What is the (a) frequency and (b) wavelength (in nm) of a source of purple light at the edge of the visible light spectrum?

Answer 1

Answer: a)
`Frequency=666*10^(12)Hz-789*10^(12)Hz`

b)
`Wavelength=380nm-450nm`

Step-by-step explanation: Visible light is a form of electromagnetic wave.

Wavelength is defined as the distance between two successive crests of a wave. It is represented as symbol
`\lambda`.

Frequency is defined as the number of complete cycles happening per second. It is represented by the symbol
`\\u`.

Wavelength and Frequency follow inverse relation,

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

where, c = speed of light =
`3*10^8m/s`

Wavelength and frequency of a wave is usually expressed in a range.

a)
`\text{Frequency of visible light}=666*10^(12)Hz-789*10^(12)Hz`

b)
`\text{Wavelength of visible light}=380nm-450nm`