The types of the solar eclipses and safety precautions on observing the solar eclipse

 

The solar eclipse phenomenon occurs when the Moon passes between the Sun and the Earth casting its shadow on the Earth's surface , where the moon ,the Earth and the Sun are nearly on one straight line with the moon in the middle . 

 

The type of the solar eclipse changes according  to the distance between the Moon and the Earth during its rotation in its oval shape orbit around the Earth .

 

The cone umbra ( umbra ) is the dark inner shadow in which the total solar eclipse appears .

 

The penumbra is the faint outer shadow in which the partial solar eclipse appears .

Although The solar eclipse does not last more than seven minutes and forty seconds , we can observe more than one type of solar eclipses occurring during the moon's passage in front of the Sun's disk and the part of the Sun that it hides from the Earth .

  The types of solar eclipses 

1. The Total solar eclipse : It is the type of solar eclipse in which   the Sun disappears completely and it is formed in the shadow area ( umbra ) of the moon , the moon is nearer to the Earth .

   

   In total solar eclipse the sun disappears completely .

    

2. The Partial solar eclipse  which is formed in the semi - shaded area ( penumbra ) of the moon , and  we can see a part of the Sun .

   

   In Partial solar eclipse , We can see a part of the Sun .

    

3. Annular solar eclipse : It is the type of solar eclipse in which the Sun appears as a lighted ring and it is formed when the Moon is in a higher orbit from Earth so , its cone shadow does not reach the Earth .

   

   When the Moon rotates farther to the Earth ( in a higher orbit from the Earth ) and comes between the Sun and the Earth , it causes an annular solar eclipse ( as the Moon appears smaller than the Sun ) .

   Safety precautions on observing the solar eclipse 

    

   We must not look directly to the Sun in ordinary days , Due to the harmful rays emitted by the Sun like ultraviolet rays ( UV ) and infrared rays . These harmful rays affect the eye especially the retina and may cause blindness within few minutes .

    

   Although the glowing of the Sun during the solar eclipse seems weak , we must not focus looking directly to the sun . Because the outer solar corona keeps on emitting harmful rays to the eye like ultraviolet rays ( UV ) and infrared rays .

    

   Doctors warn of direct observation of the solar eclipse and advise to use special glasses to observe the solar eclipse . Special solar eclipse viewers or welding glasses at a strength of 14 can protect your eyes .

    

   You can poke a hole into a piece of paper or cardboard and then look at the protected image .

    

   You need special filter to properly view from a camera , binoculars or telescope . just looking at the digital screen should be fine . But looking through the viewfinder is dangerous .

   

   In Total solar eclipse , The Sun disappears completely , and In Annular solar eclipse , The Sun appears as a lighted ring .