FBISE, NCP & NBF-aligned resources for Classes 9–12
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Physics Chapter 9 : Topic 5
Polarization of Waves
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Polarization of waves refers to:
Reasoning: Polarization is the process of restricting the oscillations of a wave to a specific direction.
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Polarization is a property associated with:
Reasoning: Only transverse waves have vibrations perpendicular to the direction of propagation, allowing polarization.
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The main evidence that a wave is transverse is:
Reasoning: Polarization proves that vibrations occur in a direction perpendicular to wave motion.
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Which of the following waves can be polarized?
Reasoning: Water surface waves have transverse components and can show polarization.
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Light can be polarized because light waves are:
Reasoning: Light has electric and magnetic field vibrations perpendicular to its direction of travel.
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In a transverse wave, particles of the medium vibrate:
Reasoning: Transverse waves have oscillations perpendicular to propagation direction.
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A longitudinal wave cannot be polarized because:
Reasoning: There is no perpendicular vibration direction to restrict in longitudinal waves.
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Sound waves in air cannot be polarized because they are:
Reasoning: Air particles vibrate parallel to the direction of sound propagation.
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If a wave passes through a polarizer and its vibrations are reduced to one direction, the wave becomes:
Reasoning: Polarization means vibrations are restricted to a single plane.
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The plane in which a polarized wave vibrates is called:
Reasoning: The plane containing the direction of vibration is the plane of polarization.
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An unpolarized transverse wave has vibrations:
Reasoning: Unpolarized waves vibrate in multiple planes perpendicular to propagation.
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A polarizer allows:
Reasoning: A polarizer selects vibrations along its transmission axis.
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When unpolarized light passes through a polarizer, the emerging light is:
Reasoning: The polarizer restricts light vibrations to one direction.
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The intensity of light decreases after passing through a polarizer because:
Reasoning: Only vibrations along the transmission axis are allowed.
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Two polarizers are placed with their axes at $\mathbf{90}^{\mathbf{o}}$. The transmitted light intensity becomes:
Reasoning: Crossed polarizers block all transmitted vibrations.
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Polarizing sunglasses reduce glare because they:
Reasoning: Reflected surfaces often produce horizontally polarized light, which sunglasses block.
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Polarization proves that light is:
Reasoning: Only transverse waves can be polarized.
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Which device is commonly used to produce polarized light?
Reasoning: A polarizer selects vibrations in one direction.
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The vibration direction of a polarized wave is:
Reasoning: Polarization restricts vibrations to a single direction.
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A wave that cannot be polarized is most likely:
Reasoning: Longitudinal waves do not have perpendicular vibrations.
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A student claims sound waves can be polarized. The correct response is:
Reasoning: Sound waves in air are longitudinal and cannot be polarized.
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If a transverse wave is passed through a polarizer, its:
Reasoning: Polarization affects vibration direction, not frequency or speed.
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The ability of a wave to be polarized depends on:
Reasoning: Only waves with perpendicular vibrations can be polarized.
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A wave traveling upward and downward while moving forward is:
Reasoning: The vibrations are perpendicular to the direction of propagation.
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Which statement is correct about polarization?
Reasoning: Polarization confirms that a wave is transverse.
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A transverse wave has vibrations in all directions perpendicular to motion. After passing through a polarizer, vibrations are:
Reasoning: The polarizer allows only one vibration direction.
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Two polarizing filters are aligned in the same direction. The transmitted intensity is:
Reasoning: Their transmission axes allow the same vibration direction.
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The phenomenon of polarization cannot occur in sound waves because:
Reasoning: Longitudinal vibrations cannot be restricted to a transverse direction.
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A wave is found to be polarizable. This means that the wave:
Reasoning: Polarization is a characteristic of transverse waves.
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The best conclusion from observing polarization of light is:
Reasoning: Polarization demonstrates that light has transverse oscillations.
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