the wavelegth range of the visible spectrum extends from violet ( 400 nm) to red ( 750 nm). Express these wavelengths in frequencies (Hz) . (1nm =` 10 ^(-9)m`)

Explanation

To find the frequencies corresponding to the wavelengths of violet (400 nm) and red (750 nm) light, we can use the formula that relates frequency (ν) and wavelength (λ):

\[ ν = \frac{c}{λ} \]

where:
- \(ν\) is the frequency in hertz (Hz),
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