Light Flashcards
(21 cards)
What is reflection of light
Light coming back from a mirror - the angle of incidence (that light enters) is same as angle of reflection
What is refraction of light
Light being bent towards normal when light passes from air to glass or water
What is dispersal of light
When light passes through pyramid it splits into the spectrum of light - ROY G BIV
Violet bends more than red
What part of the eye controls the size of pupil
Iris - coloured part
What part of eye allows you to focus on object
Lens
What part of the eye does an image form on
Retina
How do messages get from eye to brain
Optic nerve
Sound travels in waves. What is the height of wave from middle called
Amplitude
What is distance between two crests of waves called
Wavelength
If 10 waves pass a spot in 1 second what are you measuring
Frequency
How calculate speed of sound
Speed = distance /time
What is frequency measured in
Hertz
If the amplitude increases what happens to the sound
Louder
If frequency increases what happens to sound
Pitch increases
What is the em spectrum
Gamma rays, x- rays, uv ,visible,ir,micro,radio
Convex lens uses
Glasses
Eye
Magnifying glasses
What does a convex lens look like
1st ray bends downwards
Middle ray continues forward
3rd ray - bends upwards
Concave lens uses
Glasses, telescope
What does a convex lens look like
1st ray bends upwards
Middle ray continues straight
3rd ray - bends down
Label the ear
1st part - cochlea, semi circular canal
2nd part- hammer,anvil,stirrup, ear drum
3rd part - pinna, ear canal
Label the eye
1st part- cornea, lens,iris,pupil
2nd part- retina and optical nerve
