Waves (Ray Diagrams) Flashcards

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1
Q

Label the angle of incidence and the angle of reflection.

A

Notice that the angles are always between the normal and the ray.

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2
Q

How should this diagram be completed to show the reflected ray?

A

Notice that the line with the diagonal stripes represents a mirror.

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3
Q

Complete a ray diagram to show how the rabbit can be seen.

A

This arrangement of mirrors is acting as a periscope. Note that the arrows point towards the eye.

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4
Q

Label the angle of incidence and the angle of refraction.

A

Notice that the angles are always measured between the normal and the ray.

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5
Q

Complete this diagram to show light entering the glass.

A

Since the light slows down, the ray bends towards the normal.

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6
Q

Label the angle of incidence and the angle of refraction.

A
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7
Q

Complete this diagram to show light leaving the glass.

A

When the light speeds up, the ray bends away from the normal.

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8
Q

Complete this diagram to show light entering the glass.

A
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9
Q

Complete this diagram to show the light ray entering and then leaving the glass block.

A

The ray that emerges is parallel to the incident ray.

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10
Q

Label the angle of incidence and the angle of refraction at the point where the light leaves the glass block.

A
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11
Q

Complete the diagram to show how the light ray travels when the angle of incidence is less than the critical angle.

A
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12
Q

Complete the diagram to show how the light ray travels when the angle of incidence is equal to the critical angle.

A

The ray emerges from the glass block with an angle of refraction of 90°

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13
Q

Complete the diagram to show how the light ray travels when the angle of incidence is greater than the critical angle.

A

There is no refracted ray. The ray is totally internally reflected. (T.I.R.)

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14
Q

After this ray enters the block, T.I.R will occur and then it will leave the block. Complete the diagram.

A
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15
Q

After this ray enters the block, T.I.R will occur twice and then it will leave the block. Complete the diagram.

A
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16
Q

Complete a ray diagram to show how the rabbit can be seen.

A

T.I.R. has occured twice here. The prisms are acting as a periscope.