coherent light from a sodium-vapor lamp is passed through a filter that blocks everything except for light of a single wavelength. it then falls on two slits separated by 0.470 mm . in the resulting interference pattern on a screen 2.24 m away, adjacent bright fringes are separated by 2.86 mm .What is the wavelength of the light that falls on the slits?
Im lost I don't know where to start.

Respuesta :

The wavelength of the light that falls on the slit = 5.692 × 10⁻⁴m

Here we have

Fringe. separation. = 2.90 mm = 0.0029 m

Slit. separation. = 0.420 mm = 0.00042 m

Distance. from slits to. screen. = 2.14 mm = 0.00214 mm

Wavelength. is given by the following relation.

Wave length = Fringe separation × slit separation /Distance from slits to screen

Therefore;

Wave length =  0.0029 m ×  0.00042 m/0.00214 mm =  5.692 × 10⁻⁴m

In a broader sense, the term "light" can apply to electromagnetic radiation of any wavelength, whether visible or not. [4] This definition of light includes gamma rays, X-rays, microwaves, and radio waves. The main characteristics of light include intensity, polarization, frequency or wavelength spectrum, and propagation direction. One of nature's basic constants is the speed of light in a vacuum, which is 299 792 458 meters per second (m/s). [6] Visible light, like all forms of electromagnetic radiation, is propagated by massless elementary particles called photons, which serve as a representation of the electromagnetic field's quanta and can be thought of as both waves and particles. Modern physics places a lot of emphasis on the study of light, or optics.

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