Agrating that has 3900 slits per cm produces a third- order fringe at a 28.0° angle. what wavelength of light is being used? express your answer to two significant figures and include the appropriate units.

Explanation:

Given that,

Number of slits per cm,

The third fringe is obtained at an angle of,

We need to find the wavelength of light used. The grating equation is given by :

, n = 3

So, the wavelength of the light is 400 nm. Hence, this is the required solution.

the simple machine has three main features. they are:

fulcrum is the center point or pivot point of the machine. effort is input force/ applied force. load is external force/ output.

the keisha 's machine labels are

x : load

y: fulcrum

z: lever