What are the characteristics of light, and what are the characteristics of light?

Light is characterized by propagating in a straight line, but it is reflected when it encounters a plane of reflection, and if the light is perpendicular to the surface of reflection, the angle of incidence.

If the reflection angle is 90°, the light will return the same way.

Sunlight. It is composed of seven colors: red, orange, yellow, green, cyan, indigo, and purple.

Light has four important characteristics at the same time:

1. In geometrical optics, light travels in a straight line. This is illustrated by both the straight "pillars of light" and the "rays" of the sun.

2. In wave optics, light travels in the form of waves. Light is like water waves on the surface of the water, and different wavelengths of light appear different colors.

3. The speed of light is extremely fast. In a vacuum, the speed in air is slower. in the refractive index.

In larger media, such as water or glass, the propagation rate is even slower.

4. In quantum optics, the energy of light is quantized, and the quanta (basic particles) that make up light are called "light quanta, referred to as photons, so they can cause chemical changes in substances such as film photosensitive emulsions."

Light has wave-particle duality, and light is both a wave and a particle.

All light, whether natural or artificial, has its own characteristics:

1. Brightness: Brightness indicates the intensity of light. It varies with the energy and distance of the light source.

2. Direction: There is only one light source, and the direction is easy to determine. And there are multiple light sources such as cloudy.

The diffuse light of the weather makes it difficult to determine the direction or even completely lost.

3. Color: Light changes a variety of colors with different sources of light and with the different substances it passes through. The color of natural light is different from that of incandescent light or electronic flash, and the color of sunlight itself also varies with the atmospheric conditions and the time of day.

The law of light propagation in geometrical optics.

1) The law of linear propagation of light is as described above. Geodetic surveys are also based on this.

2) The law of independent propagation of light. When two beams of light meet each other in the process of propagation, they do not interfere with each other, and continue to propagate in their respective ways, and when the two beams of light converge at the same point, the light energy at that point is simply added.

3) Reflection of light.

and the law of refraction.

When light travels through the interface of two different media, part of it is reflected and part of it is refracted. Reflected rays follow the law of reflection, and refracted rays follow the law of refraction.

The speed of light is known to be extremely fast.

Light is characterized by propagating in a straight line, but it is reflected when it encounters a plane of reflection, if the light is perpendicular to the surface of reflectionIf the angle of incidence and reflection are both 90°, the light will return the same way.

Taidongsou sunlight is composed of seven colors: red, orange, yellow, green, cyan, indigo, and purple, and in geometric optics, light travels in a straight line. This is illustrated by both the straight "pillars of light" and the "rays" of the sun.

The concept of light. Light is a physical term whose essence is a stream of photons in a specific frequency band. A light source emits light because the electrons in the light source gain extra energy. If the energy is not enough to make it jump to a more outer orbit, the electrons undergo accelerated motion.

and release energy in the form of waves. If the vacancy in the orbit is filled just after the transition, the surplus goes from the excited state to the stable state, and the dust rolling electrons do not move. Otherwise, the electrons jump back to their previous orbits again and release energy in the form of waves.

The characteristic of light is wave-particle duality, that is, it has the characteristics of waves and the slowness of destroying particles, and it is a delicate and fast wave above the wavelength of X-ray, and has the properties of waves: diffraction, diffraction, reflection, interference, etc.

The following is particle-like, has a photoelectric effect, can generate light pressure, and so on.

Straight line propagation. The speed of light is 300,000 kilometers per second.

The human eye can only perceive a wavelength of about 380 nm-760 nm, which is a very small part of the light used.

Light travels in a straight line, but when it encounters a plane of reflection, it is reflected, and if the light is perpendicular to the reflecting surface, the angle of incidence and reflection are both 90°, the light will return the same way. Sunlight is composed of seven colors: red, orange, yellow, green, cyan, indigo, and purple.

All light, whether natural or artificial interior, has its own characteristics:

1. Brightness and shade: The brightness and darkness of light and lead indicate the intensity of light. It varies with the energy and distance of the light source.

2. Direction: There is only one light source, and the direction is easy to determine the high ant. If there are multiple light sources, such as diffuse light from cloudy weather, the direction can be difficult to determine or even completely lost.

3. Color: Light changes a variety of colors with different sources of light and with the different substances it passes through. The color of natural light is different from that of incandescent light or electronic flash, and the color of sunlight itself also varies with atmospheric conditions and the time of day.