[ENG] Vì sao lịght thế (khúc xạ ánh sáng - refraction)

Which diagram shows how a ray of light could pass through a glass block in air?

• A

• B

• C

• D

The diagram shows light travelling from air into glass.

Four angles v, w, x and y are shown.

Which formula is used to calculate the refractive index n of the glass?

• $n=\frac{\sin\ v}{\sin\ y}$

• $n=\frac{\sin\ v}{\sin\ x}$

• $n=\frac{\sin\ w}{\sin\ y}$

• $n=\frac{\sin\ w}{\sin\ x}$

The diagram shows light passing from air into glass.

The glass has a refractive index of 1.5.

What is the angle of refraction in the glass?

• 19°

• 22°

• 35°

• 49°

Which diagram shows the ray of light refracted correctly?

• A

• B

• C

• D

The diagram shows a ray of monochromatic light passing through a semi-circular glass block.What is the refractive index of the glass?

• 0.64

• 0.77

• 1.31

• 1.56

Light enters a glass block at an angle of incidence of 46°.

The light refracts at an angle of refraction of 26°.

What is the refractive index of the glass?

• 0.57

• 0.61

• 1.64

• 1.77