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Light Crossword

Across
Directly related to tangential velocity
High energy protons that move through space at the speed of light
A goal or milestone
SI unit of frequency
Telescope with lenses
Range of electromagnetic radiation frequencies
Subatomic particle with a mass close to 0
change in length of a wave due to the motion of the source and relative receiver
Lacking transparency
Subatomic particle of light
Rate at which vibration occurs in a wave
Disturbances in the curvature of space-time
Down
Device for the movement of electrical charge
Ratio between the dimensions of the image and the object
Displacement of spectral lines towards shorter wavelengths
Ability of a telescope to collect light
Distance between the crests of a wave
Ability of an optic instrument to separate closely adjacent images
Study of interaction between matter and electromagnetic radiation
Hole or opening through which light travels
Telescope that uses mirrors
Displacement of spectral lines towards longer wavelengths