Reflection\Refraction Flashcards
Self-luminous object
Emits own light
Non-luminous object
Does not emit own light
Diffuse reflection
Reflected light scattered in all directions from object
Regular reflection
one incident ray bounces off a plane mirror to produce one reflected ray
2nd law of reflection
The incident ray, the normal and the reflected ray all lie on the same plane
2nd law of reflection
Angle of incidence is always equal to the angle of incidence( i=r )
Real image
Image formed by the actual intersection of rays
Virtual image
Image formed by apparent intersection of rays (Plane mirror always virtual)
Lateral inversion
As result of virtual image image is flipped
Use of plane mirror
Periscope = 2 plane mirrors, allows you to see over an object
Method of no parallax
apparent relative motion of the pencils due to the motion of the observer
Refraction
The bending of a ray of light when it goes from one medium to another
Less dense = more dense
light refracted towards the normal
More dense= less dense
light refracted away from normal
Law 1 of refraction
incident ray, normal, refracted ray all on the same plane