What is wave number?

What is the wave number of a radiation of wavelength 400 nm ?

What is the wave number of a radiation of wavelength 400 nm ?

The wave number of the first line in the Balmer series of hydrogen atom is 15200 cm^(-1) . What is the wave number of the first line in the Balmer series of Be^(3+) ?

The wave number of the first line in the Balmer series of hydrogen atom is 15200 cm^(-1) . What is the wave number of the first line in the Balmer series of Be^(3+) ?

The wave number of the first line in the Balmer series of hydrogen atom is 15200 cm^(-1) . What is the wave number of the first line in the Balmer series of Be^(3+) ?

What is the wave number of a beam of light in air if its frequency is 14 xx 10^14 Hz .

What is the wave number of 4th line in Balmer series of hydrogen spectrum ? R = 1, 109, 677 cm^(-1)

What is the wave number of 4th line in Balmer series of hydrogen spectrum ? R = 1, 109, 677 cm^(-1)

What is the number of wave peaks that pass by a given point per unit time?

A sound wave of frequency 20 Hz covers a distance AB of 300 m in 10s. What is the number of waves between A and B?