When looking in the mirror at night, where should the lamp be placed to see your face clearly?

Directly in front of you, you should be looking at your own face, and if you look in the mirror, you can't see yourself clearly.

In ancient times, obsidian, gold, silver, crystal, copper, and bronze were used to make mirrors by grinding and polishing; In 3000 B.C., bronze mirrors were already used for makeup in Egypt; Ancient Egyptian bronze mirror from 1500 BC (National Museum of Egypt).

In the first century A.D., there began to be large mirrors that could illuminate the whole body of a person; In the Middle Ages, portable mirrors were prevalent in ivory or small boxes with combs; From the end of the 12th century to the beginning of the 13th century, glass mirrors with silver or iron plates as the backside appeared; During the Renaissance, Venice was the center of mirror-making, and the mirrors produced were renowned for their high quality.

In the 16th century, the cylindrical method was invented to make plate glass, and at the same time, the tin amalgamation method was invented to attach tin foil to the glass, and the number of metal mirrors gradually decreased. In the second half of the 17th century, French inventors made high-quality large glass mirrors by pouring flat glass.

Physical Optics. The lamp should be placed behind the person and higher than oneself. If you put the mirror in front and adjust the angle, you can see your face.

Put it in front of you. Shine on your face.

When you look in the mirror (note that you are looking at the mirror, not the light), the light will not be reflected directly into the eyes, and the light will be reflected from the face to the mirror and then to the eyes. If the light is directly reflected to the eyes, it will be dazzling!

Look at what you want to see, which is your face.

According to the reflection of light, it is your face that is illuminated, reflected in a mirror, and then enters the eye to be imaged on the retina.

P.S. Don't let yourself be scared.

The optical path should be analyzed first.

The image we see is from the light source to the face, from the face to the mirror, and then from the mirror to my eyes, and we see the face.

Make sure that the light from the light source shines as much as possible on the face and as little as possible on the mirror, so that's fine.

It should be between the face and the mirror, and it should be above or below the surface.

You can see it best by looking at your face.

This is what our physics teacher said, I only learned it two days ago, you can refer to it!

Well, I can see clearly when the light shines on my face at night, and the specific principle involves physical problems...

Shine a lamp on your face and let the light shine on your face.

Just put it on the opposite side of the face, not the opposite side of the mirror.

Put it in front of yourself diagonally, and when you look in the mirror, the light will not reflect directly into the eyes, but the light will reflect from the face to the mirror and then to the eyes. If the light is directly reflected to the eyes, it will cause some damage to the eyes.

Wherever you put it, the main thing is to concentrate all the light on your face, so that your face reflects more light, so that it is easier to see.

It is best to shine with a lamp above or below the face.

Haha, with copper as a mirror, you can be dressed. With people as a mirror, you can see the gains and losses. Taking history as a mirror, we can know the rise and fall.

I'll teach you a trick, from the ordinary plane mirror, what you see is not yourself in the eyes of others. You need to get two identical lenses and fold them together at 90 degrees, and the middle of the fold is a mirror image of what you look like to others.