Physics masters, please do a little favor, physics masters are helping

Chlorophyll is generally divided into four kinds, but none of them absorb green light, so the green is reflected back, if the leaves of the plant are irradiated with simple green light, the plant can not photosynthesize normally!

The seven colors of light are mixed into white light de in a certain proportion

If we absorb green light, we won't be able to see green leaves.

When the color and light are mixed, it appears white.

In fact, we see the colors. It is reflected by the object. If red is reflected.

What we see is red. The same. The leaves are green, so it reflects green light.

The rest of the light it absorbs. Why black is black. Because it absorbs all colors of light.

Therefore, it is especially hot to wear black clothes in the summer, and that's it. There is another situation where we usually look at objects that transmit light such as glass. The color we see is actually light that can pass through the object.

And you say that we see colorless light. White light, to be exact. Anyone knows that light has 3 primary colors, red, green, and blue. These three colors cross each other to form seven colors. And the seven colors of light together are white. The seven colors of the pigment are mixed together and are black.

He absorbs all the other light and reflects only green, so it looks green.

Sunlight. Forehead. Sunlight is divided into colored light by a prism, and white light is made up of a mixture of colored light. Do I understand that?

Is this, because it doesn't absorb, so it doesn't absorb, haven't studied this. 7 colors of light are accepted at the same time and at the same place is colorless, and refraction with a prism can see 7 colors, which is seen at different times and positions.

The leaves do not absorb green light because the leaves are green.

What we see should be white light, and the seven colors of light are mixed into white light in a certain proportion.

Internal energy is the sum of the total kinetic energy of the molecule and the total potential energy of the molecule, the total kinetic energy of the molecule depends on the average kinetic energy of the molecule and the amount of the substance, the molecular potential energy is mainly characterized by the temperature, so the internal energy of the object is not only related to the temperature, but also related to the average kinetic energy of the molecule and the amount of the substance.

Heat can be converted, it can increase the volume of the object and do external work, or increase the temperature of the object. Therefore, an object with a lot of heat does not necessarily use heat in which way, its internal energy is not necessarily more, and the temperature is not necessarily high (even if an object with more internal energy, its temperature is not necessarily high, because the amount of its substance can also determine the internal energy of the object).

When the temperature of an object decreases, its internal energy does not necessarily decrease, as I just said, the internal energy of an object is not only related to the temperature but also to the amount of matter. If the amount of an object increases, its internal energy can also remain the same. When the temperature decreases, if there is no work done and no heat exchange is transferred, the heat will not decrease, but will remain the same.

I am currently studying in the physics department of Yanda University (a Class A 211 engineering school), and I can be approached if I have physics questions.

h/sin30= =>t=2s

Gravity: mgt=40

Supporting force: mgcos30*t=20 root number 3

Net force: mgsin30*t=20