what is the first instrument made up of?
A typical binocular has 6 to 10 optical elements with special characteristics and up to 16 air-to-glass surfaces.
Binoculars
Because a typical binocular has 6 to 10 optical elements with special characteristics and up to 16 air-to-glass surfaces, binocular manufacturers use different types of optical coatings for technical reasons and to improve the image they produce.
who measured the distance to the andromeda galaxy to be over a million light years UNANSWERABLE what is it made up of ? Metals and gases. when was it discovered? Around the year 964. who discovered it? Abd al-Rahman al-Sufi. what this person profession? An astronomer. can you define this profession? An astronomer is a scientist in the field of astronomy who focuses their studies on a specific question or field outside the scope of Earth. was the above mentioned person honoured in any way? Since 2006, Astronomy Society of Iran – Amateur Committee (ASIAC) hold an international Sufi Observing Competition in the memory of Al-Sufi. Also, on December 7, 2016, Google Doodle commemorated his 1113th birthday. where was he born? Rey ,Iran. where is this place located? UNANSWERABLE how is the galaxy observed ? Binoculars , amateur telescope, etc.
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Binoculars [SEP] Optical coatings
Because a typical binocular has 6 to 10 optical elements with special characteristics and up to 16 air-to-glass surfaces, binocular manufacturers use different types of optical coatings for technical reasons and to improve the image they produce.