Question

determine the wavelength of sodium lamp using Michelson interferometer​

Answer 1

The wavelength of the light source can be determined if both the number of passed fringes and change and mirror distance are measured. Consequentially, if a light source with a given wavelength is known, the interferometer can be calibrated to find the distance the mirror has moved.

Answer 2

Determine the wavelength of sodium lamp using Michelson interferometer​

• In a Michelson interferometer, the two beams interact positively when the waves combine in phase and negatively when they combine out of phase, resulting in circular interference fringes. This allows us to determine the sodium source's wavelength.

• to use Newton's rings to calculate the wavelength of light coming from a sodium lamp. The glass plate and lens placed below receive light that is reflected at the plate. All four of the surfaces reflect a portion of this light upward.
• By moving the mirror and counting the interference fringes that travel by a reference point, the Michelson interferometer can be used to measure distances precisely. The distance d needed to accommodate m fringes is d = m/2.
• In the optical industry, the Michelson interferometer and its variations are used to test lenses and prisms, measure the index of refraction, and examine intricate surface details (microtopographies).
• This equation, dsin = n, can be used to determine the light's wavelength. Where n is the order of the interference spot, d is the distance between the grating's slits, and is the angle between the central maximum and the bright spot in question, lambda () is the wavelength of light.

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