Question

Set the simulation as shown in the image. Check the options Graph, screen and intensity. Select the laser, and 2 slit. The slit width is 500nm and the slits separation is 1500 nm. Drag the tool to measure distance between the picks (bright zone). Set the wavelenth to 500 nm, amplitude is maximum. 1015 s 500 nm 1 fs Frecuencia o Amplitud 0 Gráficas Pantalla Intensidad Dos ranuras 644.5 nm Ancho de la ranura 500 nm 200 1600 0 500 1000 1500 2000 2500 3000 3500 4000 4500 50o 400 3200 Intensidad O Normal Lento PhET Interferencia de Ondas Using the theory of interference (Young experiment), calculate the distance from slit to the screen. Print the simulation.

Answer 1

In this case we make use of the formula

$y = \frac{L\lambda}{d}$

where y is separation between bright fringes, d is the separation between slits and L is the dstance of screen from slits. While lambda as usual is the wavelength.

Inserting the values we get:

$644.5 = \frac{L*500}{1500}$

$L = 644.5*3 = 1933.5 \; nm = 1.9335 \; \mu m$