Unit C: Light and Optics Flashcards
How have microscopes helped further scientific knowledge?
Microscopes helped scientists see things too small for the human eye to see.
How is light transmitted?
Through light beams.
How have telescopes helped further scientific knowledge?
Allowed astronomers to observe nature in more detail than ever before.
What is the absorption of light?
When the light hits the surface and gets converted to another form of energy.
What is an object that doesn’t produce light but may reflect it?
Non-luminous.
What is an object called that produces light?
Luminous.
When light bends as it transfers from one material to another, what is it called?
Refraction.
TRUE OR FALSE - Light travels in straight lines.
True.
What is the speed of light? (km/s)
299,798 km/s.
What are the names of the light lines when it’s being reflected?
Incident ray and reflected ray.
Name 2 examples each of natural and artificial light sources.
i.e. - sun, firefly.
- lightbulb, glow sticks.
What is the difference between translucent, transparent, and opaque?
Transparent - allows light to pass through with little to no reflection
Translucent - allow some light to pass through
Opaque - does not allow light to pass through
TRUE OR FALSE - The angle of incidence is ALWAYS equal to the angle of reflection.
True.
What is the line in the middle called of a light reflection ray diagram?
Normal line.
What is the difference between convex and concave lenses?
Concave - reflecting surface that is curved inwards, produces converging rays, images appear larger.
Convex - reflecting surface that bulges outwards, produces diverging rays, images appear smaller.
