Solar Astronomy (topic 10)

Question 1

What is a H-alpha filter

Answer 1

This is a safe way to observe the sun where the filter absorbs all sunlight except for a very narrow range of wavelengths centred on a particular spectral line of hydrogen (lambda=656nm)

Question 2

What is telescopic projection

Answer 2

A baffle (card with small hole) is used to absorb most of the solar radiation before it enters the telescope