The journey of astronomical telescopes began in the early 17th century when Galileo Galilei crafted his first refracting ...

Christmas is a great time to look for a telescope for your budding amateur astronomer. But there are some things to keep in ...

Optical instruments: Microscopes and astronomical telescopes (reflecting and refracting) and their magnifying powers. Wave optics: Wave front and Huygen’s principle, reflection and refraction of ...