The wavelength range of the visible spectrum extends from violet (400nm) to red (750 nm). Express these wavelengths in frequencies (HZ).

The wavelength of a spectral line of cesium is 460 nm. calculate the frequency of the line.

A thin film is 4,000 overset @A thick. White light from an extended source falls normally on the film.If the refractive index of film is 1.5,what wavelength within the visible spectrum will be intenisifed in the reflected beam ,if visible range of the spectrum is 3,900 overset @A to 7,800 overset @A ?

A wave moves a distance of 8 m in 0.05 s. What is the wavelength of the wave if its frequency is 200 Hz?

The wavelength of light the spectral emission line of sodium is 589 nm. Find the kinetic energy at which (a) an electron and (b) a neutron,would have the same de Broglie wavelength.

Monochromatic light of wavelength 589 nm is incident from air on a water surface. What are the wavelength, frequency and speed of reflected?