light 1.2 reflection and refraction

Question 1

what are the 2 laws of reflection

Answer 1

angle of incidence is equal to the angle of reflection
the incident ray, reflected ray and normal all lie on the same plane

Question 2

what are the types of reflection

Answer 2

regular - occurs when the surface is plane/smooth
diffuse - occurs when a surface is rough

Question 3

what are the properties of an image

Answer 3

object distance = image distance
image is the same size as the object
the image is virtual
the image is laterally inverted

Question 4

what are the properties of the real image

Answer 4

formed due to an actual intersection of reflected rays
can be obtained on a screen
inverted with respect to object
image of a distance object formed by concave mirror

Question 5

what are the properties of the virtual image

Answer 5

formed when reflected rays meet if they are produced backwards
cannot be obtained on a screen
erect with respect to the image
image of an object formed by a plane mirror or concave mirror

Question 6

define lateral inversion

Answer 6

effect produced by a plane mirror in reversing images from left to right

Question 7

define refraction

Answer 7

refers to bending of light as passes from one medium to another of different optical density

Question 8

define medium

Answer 8

refers to substance through which the light is passing

Question 9

define optical density

Answer 9

property of transparent material measuring speed of light through material

Question 10

if optical density is high

Answer 10

light passing through the medium travels slowly

Question 11

where does refraction take place

Answer 11

at boundary between 2 media

Question 12

lower to higher optical density

Answer 12

toward normal

Question 13

define refractive index

Answer 13

constant value of sin theta one over sine theta two

Question 14

the larger n is

Answer 14

more material bends light

Question 15

speed of light

Answer 15

3 x 10 to the power of 8