Photography is much more complex than taking photos on a camera. Photography in its most basic definition dates back to ancient China, where the use of a camera obscura was first documented by a Chinese philosopher in the fifth century B.C. A camera obscura is the phenomenon where a small pinhole on a wall of a dark room allows light to come in. On the wall opposite to the pinhole, an upside-down image of the outside is illuminated. The science behind this strange phenomenon lies in the basic principles of optics, the study of light. Light travels in straight lines until it is blocked by a material, in which case the angle of the light changes. This concept of capturing light and forming an image was studied for hundreds of years, leading to the invention of microscopes to look at tiny living organisms, telescopes to look at the stars, and cameras to take pictures.
Elena is a high school student passionate about education, biology, and communication. When she is not studying, she loves to watch movies and volunteer in her community.
Ever wondered how plants grow or survive? In this educational lesson, we learn all about plant hormones, including gibberellin, auxin, cytokinins, ethylene, and abscisic acid.
The muscular system allows us to move and do our daily tasks. It also provides heat, stability, and blood flow for our body. There are three main types of muscular tissue: cardiac muscle, which comprises the heart muscle, smooth muscle, which comprises the linings of organs, and skeletal muscle, which are the muscles that help our body move. This article will focus on the physiology of skeletal muscles.
Introduction When I was young, reading was an integral part of my daily routine and going to the library with my sister to check out books was a sacred ritual. Yet as I got older, that thirst for reading was drowned out by the pressures of school and […]
In the midst of the COVID-19 pandemic, we have been forced to adapt to a completely new lifestyle in quarantine. However, another species – our friendly neighborhood citrus trees that have gone mainly unnoticed – has been experiencing this same dilemma for decades but for a completely different disease: The Citrus Greening Disease.