Properties & EMS
True or False: The moon is a luminous object.
False.
True or false: Convex mirrors always produce a virtual image.
True.
True or false: When using the magnification equation hi and M are always negative for inverted real images.
True.
What medium has the highest index of refraction?
Diamonds.
What type of mirror is used for security and convenience store mirrors?
What is the speed of light in a vacuum?
3.0x108 m/s
Reflecting telescopes utilize which type of mirror?
Concave or converging mirrors.
A biconcave lens causes parallel light rays to...
Diverge.
True or False: The higher the index of refraction the faster the speed of light.
False.
What part of the human eye is responsible for focusing light onto the retina?
Lens.
The separation of white light into the spectral colours is called...
Dispersion.
An object located at the centre of curvature for a converging lens will produce a real, inverted image located where?
Centre of curvature.
What is the thin lens equation?
1/f = 1/di + 1/do
What happens to a ray of light in relation to the normal when it enters a less dense medium?
Bends away from the normal.
What are the two types of light receptor cells on the retina?
Rods and cones.
The ability of light to travel in straight lines is referred to as...
Linear Propagation.
What are the two laws of reflection?
(1) The angle of incidence is equal to the angle of reflection (2) The incident ray, reflected ray, and normal all lie on the same plane.
State the first rule when drawing images produced by a converging lens.
A ray drawn parallel to the principal axis will refract through the principal focus.
When the incident angle equals the critical angle, the angle of refraction is equal to...
0.
List three technology-based applications of total internal reflection.
Fibre optic cables, binoculars, and endoscopy.
Neon lights, lightning and the aurora borealis are all examples of light produced by...
Electric Discharge.
List and explain the four characteristics used to describe images in mirrors.
SALT: Size – same, smaller, larger; Attitude – upright, inverted; Location – position on principal axis; Type – real or virtual.
What is the location of an image produced by an object located at 2F’ in a biconvex lens?
2F.
What are the two equations used to find the index of refraction?
n = c/v and n = sin<i/sin<R
What is myopia and what type of lens is used to correct it?
Near sightedness or the inability to see distant objects is corrected with diverging/convex lenses.