laser beam is incident on two slits with a separation of 0.195 mm, and a screen is placed 5.10 m from the slits. If the bright interference fringes on the screen are separated by 1.61 cm, what is the wavelength of the laser light?

615 nm

Explanation:

The separation between the two slits, d = 0.195 mm =

The bright interference fringes on the screen are separated by 1.61 cm,

Distance between the screen and the slit, D = 5.1 m

We need to find the wavelength of the laser light. The separation between two bright interference fringes is given by:

So, the wavelength of the laser light is 615 nm.

multiple

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