Question

1.) A beam of light with a 35 degree angle to the mirror surface. Determine the magnitude of the reflected beam angle?

2.) A beam of light travels from air to water. If the refractive index of water is 1.5; the air refractive index is 1 and the light propagation in the air is 3 × 10 ^ 8. Then determine the light propagation in the water?

please answer huh? please use the method yes please ...!

Answer 1

CLASS = 8

LESSON = PHYSICS

CATEGORY = Light

KEYWORDS = Refractive index, air, light

No.1 Known:

coming angle = 35⁰

Asked: large reflected angle

Answered:

According to the law of reflection:

1. coming light, reflected light, and normal lines are located on one flat plane

2. the light coming angle (i) is the same as the reflection angle (r)

So that the big reflection angle is the same, namely 35⁰

No.2

Known :

na = 1.5

nu = 1

vu = 3x10⁸ m / s

Asked: Va?

Answered:

Va / Vu = nu / na

Va / 3x10⁸ = 1 / 1.5

Va = 1 / 1.5 x 3x10⁸

Va = 2x10⁸ m / s