What would the world be like if light didn t travel in a straight line 5

First, light does not travel in a straight line in an uneven medium, for example, when we look at an object through a heat wave, it feels like any object is uneven because the air is heated unevenly.

Second, for example, light will bend under the action of a large gravitational field, when the light passes near the sun, because the mass of the sun is very large and there is a strong gravitational field, so the light will bend, but this bending is regular, because human beings on the earth can not contact such a huge gravitational field, so maybe we don't know, in fact, since we were born, we have been grasping the law with experience, how to use force to move our hands to the position we want to move, if standingWhen the optic nerve judges the light entering the eye, it will reverse its thinking and use the light to propagate in a straight line to determine the position of the object, so that if the light does not travel in a straight line, then we cannot judge the exact position of the object.

For example, if a chopstick is inserted diagonally into the water, because the light is refracted on the contact surface of water and air, it does not propagate in a straight line, so the chopsticks we see seem to be broken, that is, your eyes have deceived you.

Day is not day and night is not night.

Does light really travel in a straight line? In fact, it keeps turning, and when it comes to the vicinity of this celestial body, it is most curved1

Light energy travels in a straight line.

Light travels in a straight line in the same homogeneous medium. Aperture imaging, solar and lunar eclipses, and shadow formation all testify to this fact. Leave aside the fluctuating nature of light.

Based on the linear propagation of light, the discipline that studies the propagation of light in a medium and the laws of object imaging is called geometric optics. In geometric optics, a geometric line with an arrow represents the direction of light propagation, called light, and can propagate in a straight line.

Photoelectric Effect:

When ultraviolet light hits the surface of a metal, free electrons inside the metal escape from the metal surface, and the photoelectron emission of this ultraviolet light forms part of the photoelectric effect of ultraviolet light. The photoelectric effect of ultraviolet light is a way in which light energy is converted into electrical energy.

The photoelectric effect is divided into external photoelectric effect, internal photoelectric effect, and photogenerated volt effect. In addition to metals and semiconductors, there are also certain gases and some chemicals that can produce photoelectric effects when irradiated by ultraviolet rays, and humans, animals and plants can also produce photoelectric effects after being irradiated.

To represent the propagation of light, we usually use a straight line with an arrow to represent the path and direction of light. Such a straight line is called light.

2. What are the examples of light propagating in a straight line.

1.It is precisely because of the straight line propagation of light that shadows are seen, and people can use this principle to calculate the height of buildings based on their shadows;

2.Carpenter with a planer.

When cutting wood, one eye is always closed, which is also based on the principle of linear propagation of light;

3.A crosshair was designed for firearms, which is also an example of the linear propagation of light;

4.When queuing, the coach will look at the front or back to see if the line is in line, and it is clear that this is also using the principle of linear propagation of light.

5.Shadow formation: Because light travels in a straight line and light cannot pass through opaque objects, light shines on opaque objects, and there will be an area on the other side of the object that cannot be illuminated, which is called shadows.

6.Determine a lunar eclipse.

The Sun, Earth, and Moon are in the same straight line, with the Earth in the middle.