物理光的反射和折射 DSE、CE 選擇題（第 5 頁）

41.

A ray of light $I$ passes from a liquid $L$ into air makes an angle of incidence of $42^\circ$ . If the refractive index of the liquid $L$ is $1.35$ , the most probable emergent ray of light is

Ray I incident from the liquid on the air boundary at 42 degrees, with possible rays P, Q, R and S

42.

Light ray passing through an air bubble in water, with four emergent rays P, Q, R and S

A light ray passes through a spherical air bubble in water. Which of the following represents the path of the emergent ray ?

43.

When light enters from one medium into another, which of the following will be changed ?

(1)The frequency of the light

(2)The wavelength of the light

(3)The velocity of the light

44.

A point light source is placed in a liquid. Rays from the source leave the liquid surface through a circular area of diameter $24$ cm. The refractive index of the liquid is $1.25$ . The depth of the source below the liquid surface is

45.

A fixed object is placed in front of a plane mirror. If the mirror is moved $0.10$ m away from the fixed object, how far will the image move ?