An object that absorbs and reflects light, but does not transmit it
100
What are the 2 types of lenses?
Diverging and converging
100
What is the cornea
a protective layer of tissue around the eye that refracts light
100
What is artificial light
Light produced by human technology
100
Flashlight, telescope, cosmetic mirror, headlights of a car
What is examples of a concave mirror
200
What is the index of refraction of air
1.0003
200
What is the axis of symmetry
imaginary vertical line drawn through the optical centre of a lens
200
What controls the size of the pupil
iris
200
What is incandescent light
light produced by an object at a very high temperature
200
When light reflects off a surface, the angle of incidence is always equal to the angle of refraction
What is the Law of Refraction
300
The index of refraction for diamond is:
a)2.42
b)3.50
c)2.16
a) 2.42
300
True or False: Diverging lenses focuses on an object
False
300
True or False: The retina is the inner lining at the back of the eye that as a projection screen for the light rays entering the eye
True
300
What is phosphorescent light?
Energy is stored in the object or substance by a source of light and is emitted slowly over a period of time
300
True or False: Antonie snell was a clutch astronomer and mathematician who is credited with identifying the exact relationship between the angle of incidence and the angle of refraction
False: Willebrord Snell
400
what is the formula to calculate the index of refraction?
n = c/v
400
An object is placed between the focal point and the mirror of a converging lens. What is the size, amplitude and type of the image?
Larger, upright and virtual
400
Where is the image of an object when the eye has hyperopia?
behind the retina
400
What is electric discharge
light produced from an electric current passing through air or another gas
400
What happens when parallel light rays strike a curved surface
Each ray of light will reflect back at a slightly different position. Then all of these rays meet at a common point
500
What is the speed of light in water given that water has a refractive index of 1.33?
2.26 x 10^8 m/s
500
A convex lens has a focal length of 60 cm. An object is placed 50 cm from the lens. What is the distance of the image and what type of image is formed?
Virtual, 300 cm away
500
what is myopia?
near sightedness
500
What is light produced from friction
Triboluminecence light
500
Light passes from alcohol (n=1.36) into glass (n=1.52). If the incident angle is 32°, what is the angle of refraction?