LET THERE BE LIGHT Crossword puzzle

Diverging lens, also used for correcting near-sightedness
In a plane mirror, the angle of incidence equals the angle of ________________.
Light that the eye can see
The 'bending' of light as it travels from one medium to another
____________ is a transparent object with flat surfaces, used to separate the visible light spectrum into its different colours.
The _________ lens is thickest at the middle.
The speed of light in _____________ is 300000 m/s.
Nearsightedness is also called ______________.
LASER stands for Light Amplification by _________ emission of radiation
The type of material that allows light to pass through unobscured
The imaginary line drawn perpendicular to the reflecting surface
Optical instrument used in submarine navigation
Visible light with the longest wavelength
Light travels in _________ lines
Light particle
Light behaves like both a particle and a ______.