Polaroid Light Behavior and Properties

The video tutorial explains Malus Law, which describes the intensity of light passing through a polaroid. It details how a polaroid filters light vibrations, allowing only those aligned with its transmission axis to pass through. The tutorial covers the mathematical derivation of Malus Law, showing how the amplitude of transmitted light is affected by the angle of incidence. It also explains how the intensity of light is calculated using the law, emphasizing the relationship between amplitude and intensity.

What does a polaroid allow to pass through it?

• No vibrations at all

• Vibrations along its transmission axis

• Vibrations perpendicular to its axis

• All vibrations of light

What is the symbol used to represent a polaroid in diagrams?

• A circle

• A square

• A rectangle

• A triangle

What happens to the intensity of light when it passes through a polaroid?

• It increases

• It decreases

• It remains the same

• It becomes zero

According to Malus Law, what determines the amplitude of transmitted light?

• The color of the light

• The angle between the light's vibration plane and the polaroid's axis

• The speed of light

• The temperature of the environment

When polarized light is incident on a polaroid at an angle, what happens to the light's components?

• Both components pass through

• Neither component passes through

• Only the component along the transmission axis passes through

• Only the perpendicular component passes through

What happens to the perpendicular component of light when it hits a polaroid?

• It is absorbed

• It is reflected

• It is amplified

• It passes through

What is the mathematical expression for the transmitted intensity according to Malus Law?

• I = I₀

• I = I₀ cos²θ

• I = I₀ tan²θ

• I = I₀ sin²θ

What is the effect on transmitted intensity if the polaroid's axis is perpendicular to the light's vibration plane?

• Intensity is unchanged

• Intensity is zero

• Intensity is doubled

• Intensity is maximum

What is the relationship between light intensity and amplitude?

• Intensity is directly proportional to amplitude

• Intensity is directly proportional to the square of amplitude

• Intensity is inversely proportional to the square of amplitude

• Intensity is inversely proportional to amplitude

What happens to the transmitted intensity if the angle θ is 90 degrees?

• Intensity is maximum

• Intensity is zero

• Intensity is half

• Intensity is unchanged