Question

Match each vocabulary word with the correct definition.
Word Choices: achromatic, aperture, f number, reflector, spectrum,
Diameter of light opening in a telescope -
Band of colors formed when a beam of light is broken. -
Refraction without splitting into the color spectrum -
Telescope which uses a concave mirror -
Ratio of objective focal length to diameter -

Answer 1

Spectrum is probably "Band of colors formed when a beam of light is broken."

I'm not exactly sure about the others, but I don't want to guess and give you the wrong answers. You should try looking up each term on a search engine, or searching the definition on a search engine.