Waves Unit- Part Three (re:2024)

How would you describe an electromagnetic wave?

• A longitudinal wave that has two parts, one electrical and the other magnetic, that needs a medium to travel.

• A transverse wave that has two parts, one electrical and the other magnetic, that does not need a medium to travel.

• Only a longitudinal wave that does not need a medium to travel.

• Only a transverse wave that needs a medium to travel.

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How does light travel in a vacuum?

• It travels in various speeds depending on frequency and wavelength.

• It cannot travel in a vacuum.

• It travels at the same speed no matter the frequency or wavelength,

• It travels slower than when travelling through a vacuum.

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How does the medium affect speed of light?

• Gas is the fastest, liquid is slower, and solid is the slowest.

• Solid is the fastest, liquid is slower, and gas is the slowest.

• Gas is the fastest, solid is slower, and liquid is the slowest.

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Light is composed of tiny particles called___________________.

• Plasma

• Protons

• Neutrons

• Photons

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What is the relationship between frequency and photon energy?

• There is no relationship between frequency and photon energy.

• The greater the frequency, the greater the photon energy.

• The greater the frequency, the less the photon energy.

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Reflection in an electromagnetic wave is caused by _____________________.

• When light strikes a surface and bounce off.

• When light strikes only a rough surface and bounce off.

• When light strikes only a smooth surface and bounce off.

• The bending of light waves traveling from one medium to another.

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Diffused reflection happens when__________________________.

• The surface is smooth as glass.

• light bends when entering a different medium.

• The surface is rough and/or uneven.

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The Law of Reflection states:

• The angle of reflection is 90 degrees to the angle of incidence.

• The angle of incidence is 90 degrees to the angle of reflection.

• The angle of incidence and the angle of reflection are parallel to each other,

• The angle of incidence and the angle of reflection must equal each other.

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What does A and B in the illustration show pertaining to the law of reflection?

• 1. A - Angle of reflection

     B - incident angle

• 1. A - Incident Angle

     B - Angle of Reflection

• 1. A - Incident Ray

     B - Angle of Reflection

• 1. A - Reflected Ray

     B - Angle of Reflection

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Based on the illustration, if the incident ray is reflected, what will the angle of reflection be?

• 1. 135 degrees

• 1. 45 degrees

• 1. 315 degrees

• 1. 25 degrees

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