Prism, a transparent object surrounded by two intersecting planes that are not parallel to each other, used for splitting or dispersing light beams. Prism is a polyhedron made of transparent materials (such as glass, crystal, etc.). It is widely used in optical instruments. Prisms can be divided into several types according to their properties and uses. For example, in spectral instruments, the “dispersion prism” that decomposes the composite light into spectrum is more commonly used as equilateral prism.

A prism is a transparent body with a triangular cross section. It is an optical instrument with triangular cross section made of transparent material. It belongs to a kind of dispersion prism, which can make polychromatic light disperse when passing through the prism. A prism is a triangular cylinder formed by the intersection of the planes of a transparent glass body. Generally, the main section is a triangle, and its structure is divided into surface, edge, top angle, bottom, bottom and top line.

Source: @base_illusion

It’s amazing that the ocean has built a variety of life. It’s hard to count their types. But if you ask who is the smartest animal in the ocean, there must be a definite answer. It’s “killer whale”. Killer whale is a highly intelligent lactating animal with self-awareness and can interact with humans. It can be called a genius among marine animals.

When scientists study killer whales, they find that they not only have highly developed wisdom, but also have very rich emotions. When hunting fails, they will throw the pot to a culprit, and then have a critical fight to vent.

Source: @__ll_leelee__

Raven is the general name of several kinds of birds with thick beak and black feathers. It is larger than crow. Ravens and crows are closely related and belong to the genus Corvus. The beak of a raven is much thicker than that of a crow, and its feather coat is more fluffy, especially the feathers of its throat. The Raven’s feathers are bright and have a blue or purple glow.

Ravens can live in different climates, and in fact they are the most widely distributed species in the genus Corvus. They are distributed throughout the northern region, from Arctic and temperate habitats in North America and Eurasia, to deserts in North Africa and islands in the Pacific.

Source: @addictionink2017

I believe everyone has seen the film “venom”. I dare say that many friends also want to have such a handsome symbiotic partner. When the venom is running, its own speed can exceed that of a helicopter, while when it is running with four limbs, it is twice the speed of running with two legs.

Venom is a thoughtful symbiont of alien life, which appears almost in liquid form. It needs to be combined with a host to survive, and can give the host powerful superpowers. As long as the venom is attached to a host, it can replicate the host’s ability through genes, such as the death attendant’s self-healing and spider man’s super ability, but the replication ability needs a certain attachment time.

Source: @daddy.ql

In big cities, sculptures and statues can be seen everywhere. In ancient historical districts, there are usually celebrity sculptures that have made great contributions to the society at that time. They stand between cities in the form of statues for tourists to understand and explore the ancient and modern history of a city.

Generally speaking, the sculptures standing between cities are of commemorative value to a city. They can be a poet, a singer or a political leader. No matter what kind of image, it played a certain role in promoting the society at that time. When tourists first visit a city, they can deepen their impression through these statues, so that they can learn more about the historical and cultural heritage behind a city.

Source: @b.o_tattoo