Thông tin liên hệ
Bài viết của Trần Bảo Ngọc

Introduction to Wave Optics

The colors reflected by this compact disc vary with angle and are not caused by pigments. Colors such as these are direct evidence of the wave character of light. (credit: Infopro, Wikimedia Commons) Examine a compact ...

Tác giả: Trần Bảo Ngọc viết 15:33 ngày 25/05/2018 chỉnh sửa

Accessory Structures of the Skin

Accessory structures of the skin include hair, nails, sweat glands, and sebaceous glands. These structures embryologically originate from the epidermis and can extend down through the dermis into the hypodermis. Hair is a keratinous filament growing out ...

Tác giả: Trần Bảo Ngọc viết 15:33 ngày 25/05/2018 chỉnh sửa

Cell Division

The continuity of life from one cell to another has its foundation in the reproduction of cells by way of the cell cycle. The cell cycle is an orderly sequence of events that describes the stages of a cell’s life from the division of a single parent ...

Tác giả: Trần Bảo Ngọc viết 15:32 ngày 25/05/2018 chỉnh sửa

Introduction to Society and Social Interaction

Sociologists study how societies interact with the environment and how they use technology. This Maasai village in Tanzania looks very different from a rural American town. (Photo courtesy of Guillaume ...

Tác giả: Trần Bảo Ngọc viết 15:32 ngày 25/05/2018 chỉnh sửa

Importance of Biodiversity

This tropical lowland rainforest in Madagascar is an example of a high biodiversity habitat. This particular location is protected within a national forest, yet only 10 percent of the original coastal lowland forest remains, and research suggests half the ...

Tác giả: Trần Bảo Ngọc viết 15:32 ngày 25/05/2018 chỉnh sửa

Patterns in Spectra Reveal More Quantization

High-resolution measurements of atomic and molecular spectra show that the spectral lines are even more complex than they first appear. In this section, we will see that this complexity has yielded important new information about electrons and their ...

Tác giả: Trần Bảo Ngọc viết 15:32 ngày 25/05/2018 chỉnh sửa

Discovery of the Atom

How do we know that atoms are really there if we cannot see them with our eyes? A brief account of the progression from the proposal of atoms by the Greeks to the first direct evidence of their existence follows. People have long speculated ...

Tác giả: Trần Bảo Ngọc viết 15:32 ngày 25/05/2018 chỉnh sửa

Common Misconceptions about Evolution

Although the theory of evolution initially generated some controversy, by 20 years after the publication of On the Origin of Species it was almost universally accepted by biologists, particularly younger biologists. Nevertheless, the theory of evolution is ...

Tác giả: Trần Bảo Ngọc viết 15:31 ngày 25/05/2018 chỉnh sửa

Nuclear Radioactivity

The discovery and study of nuclear radioactivity quickly revealed evidence of revolutionary new physics. In addition, uses for nuclear radiation also emerged quickly—for example, people such as Ernest Rutherford used it to determine the size of the nucleus ...

Tác giả: Trần Bảo Ngọc viết 15:31 ngày 25/05/2018 chỉnh sửa

Social Change

Collective behavior and social movements are just two of the forces driving social change , which is the change in society created through social movements as well as external factors like environmental shifts or technological innovations. ...

Tác giả: Trần Bảo Ngọc viết 15:31 ngày 25/05/2018 chỉnh sửa