waves 2 property of light

Question 1

what is the angle of incidence

Answer 1

the angle between the light striking the mirror and the normal

Question 2

what is the normal

Answer 2

a theoretical line that sits perpendicular to the mirror at the point in which the light ray strikes the mirror

Question 3

angle of reflection

Answer 3

the angle between the normal and the reflected light ray

Question 4

angle of refraction

Answer 4

the angle between the refracted ray and the normal r

Question 5

what is the emerging angle equal to

Answer 5

the angle of incidence

Question 6

what is the equation for the refractive index with the angle of incidence and angle of refraction as variables

Answer 6

refractive index=sin(angle of incidence)/sin(angle of refraction)
n=sin(i)/sin(r)

Question 7

what is the light spectrum

Answer 7

red, orange, yellow, green, blue, indigo, violet

Question 8

what has the largest wavelength on the light spectrum

Answer 8

red

Question 9

what has the smallest wavelength on the light spectrum

Answer 9

violet

Question 10

what has the highest frequency on the light spectrum

Answer 10

violet

Question 11

what has the lowest frequency on the light spectrum

Answer 11

red

Question 12

why do all the colours in white light split apart when refracted

Answer 12

refraction of the light ray causes the different wavelengths to refract at different amounts, red refracts the least and violet reacts the most

Question 13

why does refraction take place in different mediums

Answer 13

As the light ray enters a new medium such as glass or water they slow down for it is more dense than the air causing the light to change direction towards the normal

Question 14

why does the light change direction away from the normal

Answer 14

for as it enters air which is less dense it speeds up and as a result the light changes direction away from the normal

Question 15

what is the equation for the refractive index with the critical angle as a variable

Answer 15

n=1/sin(c)

Question 16

what is the equation for the critical angle with the refractive index as a variable

Answer 16

c=sin-1(1/n)

Question 17

what is the critical angle

Answer 17

the angle of incidence at which the angle of refraction is equal to 90* (generally takes place when a more dense medium leads into air)

Question 18

what is the angle of total internal reflection

Answer 18

the angle of reflection of a light ray as it gets reflected by the glass inside the new medium

Question 19

what is the refractive index

Answer 19

the ratio between the sine of the angle of incidence and the sine of the angle of refraction