light headed and blurred vision after exercise - Viral Trends
ST. LOUIS -- St. Louis Cardinals center fielder Jim Edmonds was diagnosed with post-concussion syndrome Wednesday, one day after leaving a game because of dizziness and blurred vision.
Understanding the Context
Edmonds ... The main source of natural light on Earth is the Sun. Historically, another important source of light for humans has been fire, from ancient campfires to modern kerosene lamps. With the development of electric lights and power systems, electric lighting has effectively replaced firelight.
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Light is electromagnetic radiation that can be detected by the human eye. Electromagnetic radiation occurs over an extremely wide range of wavelengths, from gamma rays with wavelengths less than about 1 × 10 −11 metres to radio waves measured in metres. Is light a wave or a particle? How is it created? And why can’t humans see the whole spectrum of light?
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All your questions answered. Light is both a particle and a wave. Light has properties of both a particle and an electromagnetic wave but not all the properties of either. It consists of photons that travel in a wave like pattern. But what exactly is light? We catch glimpses of its nature when a sunbeam angles through a dust-filled room, when a rainbow appears after a storm or when a drinking straw in a glass of water looks disjointed.
The different colours of light have different wavelengths and frequencies. Red light has the longest wavelength, and the lowest frequency in the visible spectrum. Light is a transverse, electromagnetic wave that can be seen by the typical human. The wave nature of light was first illustrated through experiments on diffraction and interference.