SCIENCE Flashcards
(36 cards)
Where do electromagnetic waves come from originally, and how do they travel?
Come from the sun, and travel through space
What types of electromagnetic radiation have the highest frequency? What kind of energy? What is their wavelength?
Gamma
Higher energy–shorter wavelength
How can we measure frequency? How can we measure wavelength
Frequency= # of waves that pass through a given point in a certain amount of time.
Wavelength= Distance between a point on one wave to the exact same point on another wave
What types of radiation can cause human harm
gamma, X-ray and ultra violet
What types of electromagnetic radiation is used for Cooking? Communication?
Cooking= microwave communication= radio
when light bounces off of a surface its called
Reflection
When objects take in light its called
absobtion
when light bends as it passes through a new medium it’s called
Refraction
What does refraction do to objects? how does it make these objects appear to us?
Magnafiys or minifys
Changes the size
Objects that are transparent allow light to___
pass through
List at least three examples of transparent objects
water glass window plastic wrap
When an object is translucent, how does light interact with it?
Some light passes through
Three examples of translucent items
Lampshade eyelid window shade
Opaque objects allow____
No light to pass through
Three examples of opaque objects
A tree, A wall, and a car
Visible light is part of the __________ spectrum
electromagnetic
When light passes through a prism, it is broken up into these colors.
ROYGBIV
When colors are reflected off of an object what happens
you see those colors
what do we see when all the colors are absorbed
Black
Why are red and green used for stoplights
Because they are the most sensitive to your eye,
Why is the sky blue
Blue light reflects off of
Light rays enter the_____to bend the light and help the eye focus. It then passes through the ______. The amount of light allowed to pass through is controlled by the _______. At this point, the light passes through the ______ which focuses on the ______. Here it hits ______, which turns light into electrical signals. These signals pass to the brain through the ____ nerve
Cornea, pupil, iris, lens, retina, photoreceptors, optic
What is a convex mirror shaped like, and why?
The outside of a bowl, because it curves outwards.
When we see images in a convex mirror they appear,
smaller
