Question

C)Calculate the wave number for light with a wavelength of 3.0 x
10*7cm?
how answer with steps I will make them brain list and I will thank

Answer 1

Explanation:

The distance between two successive similar points on a wave is called as wavelength. It is denoted by λ.

Units: cm, Angstroms (Ao), nano meters (nm), milli microns (mµ) etc.,

Note:

1 Ao = 10-8 cm.

1 nm= 10-9m = 10-7cm

Frequency (ν): The number of vibrations done by a particle in unit time is called frequency. It is denoted by 'ν'.

Units: cycles per second = Hertz = sec-1.

Velocity (c): Velocity is defined as the distance covered by the wave in unit time. It is denoted by 'c'.

Velocity of light = c = 3.0 x 108 m.sec-1 = 3.0 x 1010 cm.sec-1

Note: For all types of electromagnetic radiations, the velocity is a constant value. The relation between velocity (c), wavelength (λ) and frequency (ν) can be given by following equation.

velocity = frequency x wavelength

c = νλ

Wave number (): The number of waves spread in a length of one centimeter is called wave number. It is denoted by . It is the reciprocal of wavelength, λ.

units: cm-1, m-1

Amplitude: The distance from the midline to the peak or the trough is called amplitude of the wave. It is usually denoted by 'A' (a variable). Amplitude is a measure of the intensity or brightness of light radiation.

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