Light

Question 1

law of reflection

Answer 1

1)the incident ray, the reflected ray and the normal at the point of incidence all lie on the same plane

Question 2

law of reflection 2nd

Answer 2

the angle of incidence, I, is equal to the angle of reflection

Question 3

diffuse reflection (rough surface )

Answer 3

the reflected ray will not parallel

Question 4

regular reflection (smooth surface)

Answer 4

reflected properly

Question 5

denser?

Answer 5

means 密度

Question 6

when does a light ray bend?

Answer 6

a ray of the light bend towards the normal when it enters an optically denser medium at an angle due to a decrease in speed.

Question 7

what happens when the ray is a straight line (90 degree )

Answer 7

it won’t bend!!!!!

Question 8

laws of refraction

Answer 8

the incident ray, the refracted ray and the normal at the point of incidence all lie on the plane

Question 9

law of refraction

Answer 9

For two given media, the ratio sin i/sin r is a constant whr i is the angle of incidence and r is the angle of refraction(know as the smells law too:>)

Question 10

vacuum

Answer 10

NO AIR XD

Question 11

find refractive index using speed of light

Answer 11

refractive = speed of light in vacuum/speed of light in medium n=c/v

Question 12

refractive index of medium with respect to air

Answer 12

real depth / apparent depth

Question 13

what is criticle angle

Answer 13

the critical angle is defined as the angle of incidence in the optically dense medium for which the angle of refraction in the optically less dense medium is 90 degree.

Question 14

how find criticle angle IMP

Answer 14

sin c = 1/n n(refractive index)