Question

What is the frequency of red light having a wavelength of 7.87E-5 cm? (c= 3.00E10 cm/sec)

Answer 1

`\huge{\boxed{ 3.81 * {10}^(14) \: Hz}}`

Step-by-step explanation:

The frequency of the red light can be found by using the formula;

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

where;

`\lambda` is the wavelength in m /cm

c is the speed of light which from the question is 3.00 × 10¹⁰ /cm/s

f is the frequency in Hz

From the question

`\lambda` = 7.87 × 10-⁵ cm

`\therefore \: f = \frac{3.00 * {10}^(10) }{7.87 * {10}^( - 5) } \\ = 3.81 * {10}^(14)`