Light Flashcards
What’s incident ray?
A day of light arriving at the surface
What is reflected ray
A ray of light that has been reflected from a surface
What’s the law of reflection
The angle of incidence equals to angle of reflection
When an object is reflected In a plane mirror its image is:
Same size
Same distance
Laterally inverted
Virtual
What’s refraction
The bending of light when passing from one medium to another
When entering a denser medium the ray of light bends ____ the normal
Towards
When entering a less dense medium the ray of light bends ____ from the normal
Away
When a ray of light hits a boundary from the normal, does the light bend or no?
It doesn’t bend
Light travels fastest in what
In a vacuum
Does light travel faster or slower in glass, water and other transparent substances
Slower
What’s the refractive index formula (Hint: they are two)
n=sin(i)/sin(r) and n=speed of light in vacuum/speed of light in medium
Total internal refraction only occurs when?
Incident angle is greater than the critical
What’s snells law?
n1 sin1= n2 sin2
Critical angle formula
n=sin(90)/sin(c) or n=1/sin(c)
Converging lens are ___ edge lens
Thin
