How to repeat the experiment with two slits in life?

Question

Physics

Hello. I want to repeat this ( https://en.wikipedia.org/wiki/double-slit_experiment ) experiment. I took a sheet, made 2 cuts, a candle with a flashlight - on the wall I see the shadow of my sheet with two cuts. So where is the wave effect? Where are ten slots? I don't need to launch a neutron and then watch it where it goes. I just want, as in the explanation of the experience, to see some holes in the shadow.

Answer 1

The distance between the slits should be comparable in several wavelengths of the light used, the wiki contains a calculation formula for how far the screen should be, and what will be the distance between the lines on the screen depending on the distance between the slits

For example, if two slits are separated by 0.5 mm (d) and illuminated by a laser with a wavelength of 0.6 μm (λ), then at a distance of 1 m (z), the distance between the strips will be 1.2 mm.

It will not work here to use a flashlight, you need coherent light of one frequency, i.e. laser
ps Experience_Jung

Young's experiment with two slits is not easy to repeat outside the laboratory, since it is not easy to make a suitable slit width. However, the experience of interference from two small holes can be successfully reproduced by the simplest means, the essence of the physical phenomena occurring in this case does not change.
The setup of the experiment is as follows: in the foil from a chocolate bar, two extremely thin holes should be made with the thinnest sewing (preferably beaded) needle as close to each other as possible. You should not pass the needle through, you just need to prick holes with the very tip. Next, in a well-darkened room, illuminate the puncture site with a powerful light source. It is convenient to use a laser pointer, as its light is monochromatic. On a screen located 0.5-1 meter, it is possible to observe the diffraction pattern and interference fringes.

Answer 2

Do everything on the wiki.
Foil. Two close pinholes. Phone flashlight as a light source. Lock yourself in a dark closet. Get an interference pattern.
Just tested in 3 minutes.

Answer 3

coherent radiation is needed. such as a laser pointer.
or at least through a color filter
then there will be an interference pattern