Question 1

In a reflecting prism that changes the path of light by an angle of

180^{\circ}

, what is the precise physical explanation for why color dispersion (splitting of light) does not occur despite white light entering the prism?

Accepted Answer

Because the light enters and exits perpendicular to the side faces, while total internal reflection occurs on the slanted face without refraction that would cause dispersion.

Answer

Because the refractive index of the prism material is constant for all light wavelengths at the critical angle of incidence.

Answer

Due to the use of a special coating on the slanted face of the prism, the decomposition of white light into its seven colors is prevented.

Answer

Because the angle of incidence inside the prism is always smaller than the critical angle

180^{\circ}

, which prevents refraction.

Question 2

When using a reflecting prism (right-angled and isosceles) to invert an image by

180^{\circ}

, light falls perpendicularly on the hypotenuse, resulting in two consecutive total internal reflections inside the prism because the angle of incidence on the two side faces is

45^{\circ}

, which is greater than the critical angle for glass, which is approximately

42^{\circ}

.

Accepted Answer

true

Answer

false

Question 3

What is the angle of deviation of a light ray that falls perpendicularly on one of the legs of an isosceles right-angled reflecting prism, if it strikes the hypotenuse at an angle greater than the critical angle?

Accepted Answer

90

Question 4

Match each application or property of the reflecting prism with its appropriate physical or functional description based on your study of the phenomenon of total internal reflection:

Question 5

Arrange the physical steps and optical paths that occur when a light ray falls perpendicularly on one of the legs of an isosceles reflecting prism (

180^{\circ}

) with the aim of changing the light path by

45^{\circ}

:

Question 6

Classify the following items into the correct groups based on the properties and applications of the reflecting prism in physics.

Question 7

Arrange the correct physical path for a light ray falling perpendicularly on one of the legs of an isosceles reflecting prism to change its path by

180^{\circ}

.

Accepted Answer

Transmission without refraction,Fall at an angle of

180^{\circ}

,Total internal reflection,Change direction by

45^{\circ}

Question 8

Rearrange the scrambled letters to identify the name of the optical device that uses a reflecting prism to invert images and adjust the light path by an angle of

180^{\circ}

.

Accepted Answer

Periscope

Question 9

When using a reflecting prism with a refractive index of

180^{\circ}

in optical instruments, which of the following statements accurately describe the behavior of light or the features of the prism compared to plane mirrors? (Select two)

Question 10

In the reflecting prism used in a periscope to rotate the light path by an angle of

180^{\circ}

, what is the precise physical explanation for its superiority over conventional plane mirrors?

Accepted Answer

Because the angle of incidence of light inside the prism is

180^{\circ}

, which is greater than the critical angle for most types of glass, ensuring a reflection of

45^{\circ}

.

Answer

Because the refractive index of the prism material must be greater than

180^{\circ}

to ensure that total internal reflection occurs when light falls perpendicularly on the side face.

Answer

Because the prism increases the speed of light as it travels from air to glass, causing it to refract at a precise right angle.

Answer

Because the reflecting prism flips the image vertically only, without affecting the horizontal directions, which facilitates the observation process.

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