Flashcards
study science
Flashcards do conjunto (29)
- 1how does light travel as both a wave and a raylight moves forward in a straight line (ray)
light forms as a compression or transparent wave - 2what's the difference between reflection and refractionrefraction: bending light/changing its direction when passing through another material
reflection: light bounces off of the surface of a material - 3image produced when object is close to a concave mirrorlarge and upright
- 4image produced when object is far from concave mirrorsmaller and upside down
- 5list the ems spectrum from highest frequency to lowest.gamma rays, x-rays, UV light, visible light, infrared light, microwaves, radiowaves
- 6what colour has the highest frequencyviolet
- 7what do we call "light spreading out into a spectrum of colour?"dispersion!
- 8how does a raindrop form a rainbow?by refracting light rays at different angles.
- 9what is the angle at which light reflects in a drop of water?42 degrees!
- 10what part of the eye carries pain receptors?conjunctiva!
- 11what muscle helps change the shape of the lens?ciliary muscles.
- 12if you are near-sighted, do the light rays converge in front of your retina, or behind?in front.
- 13true or false: convex lenses DIVERGE light convex mirrors.false, convex lenses CONVERGE.
- 14define a diffuse reflectionsurface is not smooth and shiny
light reflects in all directions - 15true or false: a specular reflection is one that is not visible/reflection is not made.false, a specular reflection is one that is regular and visible.
- 16true or false: the angle of incidence is always the same as the angle of reflection.true
- 17true or false: the sclera filled with liquid called aqueous humourfalse, it's filled with a liquid called vitreous humour.
- 18whats wrong with this statement? "the wavelength is measured from crest to trough."correction: the wavelength is measured from crest to crest/ trough to trough/ rest pos. to rest pos.
- 19is tinted glass transparent, translucent, or opaque?translucent.
- 20if you are standing 2 focal points away from a concave mirror, what size is the image?image is smaller and upside down
- 21if you are standing 2 focal points away from a convex mirror, what size is the image?smaller and upright.
- 22light moves in a _________"straight line"
- 23the smaller the light source the ________ the closer the object is to the light source the _________"sharper edges of the shadow"
"larger the shadow" - 24what is a wavea vibration that carries energy through space
- 25what is a crest?the farthest point from the resting position.
- 26what is a resting position?the level the wave would be if it were still.
- 27what are UV light rays used for?killing germs, radiation therapy, suntanning, worrying mothers.
- 28what's a fovea?where light is focussed and vision is sharpest!
- 29how did you like these flashcards?send me feedback so I can know whether to make more for every test!!
Informações
- Descrição
- Grade 8 Science FlashCards sobre study science, criado por Venus Hanaei em 17-11-2021.
- Criado por
- Venus Hanaei
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