Determine the wavelength of a monochromatic beam of light that impinges on a double slit with a slit separation of 2.80 mm. bright fringes are produced on a screen 1.20 m from the double slit. the brights are separated by .024m.

Explanation:

For constructive interference, the expression is:

Where, m = 1, 2, .....

d is the distance between the slits.

The formula can be written as:

....1

The location of the bright fringe is determined by :

Where, L is the distance between the slit and the screen.

For small angle ,

So,  

Formula becomes:

Using 1, we get:

For two fringes:

The formula is:

For first and second bright fringe,  

Given that:

d = 2.80 mm

L = 1.20 m  

Also,  

1 mm = 10⁻³ m

d = 2.80×10⁻³ m

Applying in the formula,  

increasing transnational kinetic energy. because the transnational kinetic energy formula consists of only two variables, mass and velocity, increasing one of those properties is the only way to increase an object's transnational kinetic energy. increases to mass and velocity, however, do not have the same impact.

real, smaller and upside-down.   so the answer should be b.