"Screening" of light emitted by a point light source

"Sifter" three rays from the light of the LED lamp, mark them on paper with a pencil and extend them to the light source. Answer the questions.

Light propagation and light beam

The light spreads in a straight line in the room. We represent the direction of propagation of light rays in the drawings as straight lines, which we call light rays.

Instructions for conducting the experiment
Light from a point light source
What to notice

We can call the light streak that appears on the paper in the experiment as a light beam. However, we should note that the light beam is purely invented by physicists - they do not exist in nature.

Why did we invent them?

Rays of light show the direction in which the light travels. Since we also see and know that light travels in a straight line, we also understand where the light came from.

Applying this knowledge in this experiment, we get an image that describes the light from a point light source.

Light from a point light source

Point light source

A point light source is a light source in which light is emitted from only one point.

Regarding the characteristics of the LED lamp used in the experiment, it is stated that its rays fill a solid angle of . In an attempt to check whether such a statement is true?
There is such a picture in the textbook. How does such a situation differ from the experiment, in which it is similar?
How to sum it up

We can ask, how many rays are reflected from one point light source? We picked three and drew them. If we had placed the slit system a little differently, we would have obtained an image with slightly shifted rays. If we were to draw the rays from all the possible locations of the slits in the house, we would end up with one area densely packed with rays, which is the same spot of light we started the exercise with.