Light and sound

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Question 44

A sonar sound wave is emitted from a research vessel and reflects off a flat, horizontal seabed. Which statement correctly describes this reflection?

A: The angle of reflection is measured between the reflected wave path and the horizontal seabed.
B: The angle of incidence is equal to the angle of reflection, with both angles measured relative to the normal to the seabed.
C: The reflected wave always travels at a higher speed than the incident wave.
D: The angle of incidence is measured between the incident wave path and the horizontal seabed.

[1]

A ray of light passes from air into a beaker filled with pure glycerol. The angle of incidence $i\,$ is $58^\circ\,$ and the angle of refraction $r\,$ is $35∘35^\circ$ .

State the name of the line drawn perpendicular to the surface of the glycerol at the point where the light ray enters.

[1]

State the relationship between the refractive index $n\,$ of the liquid, the angle of incidence $i\,$ in air, and the angle of refraction $r\,$ in the liquid.

[1]

Calculate the refractive index of glycerol. Give your answer to 2 decimal places.

[2]

Inside a pair of binoculars, glass prisms are used to reflect light rays by $90^\circ\,$ or $180^\circ\,$ without any light escaping through the back faces of the prism.

State the name of the physical phenomenon that allows light to be completely reflected at these internal boundaries.

[1]

Explain the two conditions required for this phenomenon to occur at the boundary inside the prism.

[2]

Light and sound

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Question 44

A sonar sound wave is emitted from a research vessel and reflects off a flat, horizontal seabed. Which statement correctly describes this reflection?

A: The angle of reflection is measured between the reflected wave path and the horizontal seabed.
B: The angle of incidence is equal to the angle of reflection, with both angles measured relative to the normal to the seabed.
C: The reflected wave always travels at a higher speed than the incident wave.
D: The angle of incidence is measured between the incident wave path and the horizontal seabed.

[1]

A ray of light passes from air into a beaker filled with pure glycerol. The angle of incidence $i\,$ is $58^\circ\,$ and the angle of refraction $r\,$ is $35∘35^\circ$ .

State the name of the line drawn perpendicular to the surface of the glycerol at the point where the light ray enters.

[1]

State the relationship between the refractive index $n\,$ of the liquid, the angle of incidence $i\,$ in air, and the angle of refraction $r\,$ in the liquid.

[1]

Calculate the refractive index of glycerol. Give your answer to 2 decimal places.

[2]

Inside a pair of binoculars, glass prisms are used to reflect light rays by $90^\circ\,$ or $180^\circ\,$ without any light escaping through the back faces of the prism.

State the name of the physical phenomenon that allows light to be completely reflected at these internal boundaries.

[1]

Explain the two conditions required for this phenomenon to occur at the boundary inside the prism.

[2]

Light and sound

Question 44

Light and sound Questions

Light and sound

Question 44

Light and sound Questions