Light and Optical Devices Crossword Puzzle

QUESTIONS LIST:

• lacrimal : the gland that makes sure you can cry
• mirage : trick of light
• spectrum : all colours are a part of this
• speedoflight : there are almost 300,000,000 of these per second
• optical : this nerve sends impulses to the brain
• endoscope : used in key-hole surgeries
• euclid : he suggested the travel direction of light
• spectacles : what eyeglasses were called
• dualnature : the mystery of light
• iris : coloured part of the eye
• newton : showed there are many colours that make up white light
• bioluminescent : living organisms that are this type of light
• opaque : materials that absorb light and can't be seen through
• galileo : created a refracting telescope
• ptolemy : he discovered the property of refraction
• gamma : shortest wave length rays
• red : one of the longest wavelengths we see when the sun sets
• convex : rear and side view mirrors, and human eye are this
• incident : type of ray in the reflection law
• hyperopia : you have this condition if you have challenges seeing objects close up