Good morning steemit  Happy day bright with happiness 

Sun light
The  sun emits light in the form of electromagnetic waves, and man can see  this light which is visible, and the rest of the light does not see the  naked eye is invisible, and what distinguishes the sunlight that it  consists of several colors from red to violet, known as rainbow colors, These colors and their energy vary in wavelength. The higher the  wavelength of light, the less energy it has; the red color carries the  longest wavelength, and the shorter it is to the violet, which carries  the shortest wavelength
In  the Middle Ages, some Muslim scholars (Ibn Sina) and al-Hassan ibn  al-Haitham (the son of Ibn al-Haytham), and Ibn al-Haytham, were the  first to study the light of the sun. He  has many contributions to light such as: the state of the moon,  rainbow, eclipses, eclipses, mirrors (the equilateral, spherical  intersection), the first to know that light does not emanate from the  eye; it falls on the eye and is transferred to the brain in the form of  an image, Of his science is many and many scholars disagree Lord, and translated his book into Latin
No  one came to study his theories and what he invented only seven  centuries later by the English scientist (Isaac Newton) in 1666. He  first discovered that the white light emitted several colors, and he  used the publication that showed through this experiment that he It is possible to separate the colors from the white color, and this  is the discovery that the rainbow is a natural physical state resulting  from the refraction and analysis of sunlight through a drop of water 

Types of solar radiation 

 In talking about solar radiation we point out that there are three types of them, namely

Thermal rays (invisible): These rays range in length from 0.75 to 40  microns. They are invisible, not visible to the naked eye and are known  as infrared rays, and are estimated to be from the sun (46%).

Light  rays (visual): These rays see the naked eye, and the length of the  wavelengths between (40 0.74 microns) and the intensity of light rays in  the afternoon during the summer, and the proportion of sunlight (45%). UV rays: These rays are also invisible, not visible to the naked eye.  Its wavelength is between 0.1740 microns and is estimated to be about 9%  of the sun's rays

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