Tourmaline Crystals and Light Polarization

The video tutorial explains the concept of light polarization, where the electric field vector of light is confined to a particular direction. It demonstrates this phenomenon using tourmaline crystals. When unpolarized light passes through a tourmaline crystal, it becomes plane polarized. The tutorial further explores how the orientation of two tourmaline crystals affects the intensity and color of the emergent light beam, highlighting the parallel and rotated positions of the crystals.

What is the primary characteristic of light that allows it to be polarized?

• Its longitudinal nature

• Its transverse nature

• Its speed

• Its wavelength

In the context of light, what does the term 'polarization' refer to?

• The reflection of light

• The change in light's color

• The increase in light's speed

• The confinement of light's electric vector to a specific direction

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

• It becomes less intense

• It remains the same

• It becomes more intense

• It disappears completely

What is the result when light vibrations are confined to one direction?

• Diffused light

• Unpolarized light

• Circularly polarized light

• Linearly polarized light

What is the effect of rotating a tourmaline crystal around the light beam axis?

• The light becomes more intense

• The light disappears

• The color of the light changes

• The intensity of the light changes

What is the position called when two tourmaline crystals have their crystallographic axes parallel?

• Crossed position

• Neutral position

• Parallel position

• Perpendicular position

What happens to the emergent light when two tourmaline crystals are in a parallel position?

• The light disappears

• The light remains colored

• The light intensity increases

• The light becomes unpolarized

What is observed when the second tourmaline crystal is rotated continuously?

• The light color changes

• The light intensity decreases

• The light intensity increases

• The light becomes unpolarized

What is the significance of the crystallographic axis in the experiment with tourmaline crystals?

• It changes the wavelength of light

• It influences the direction of light vibrations

• It affects the color of light

• It determines the speed of light

What is the final observation when the crystallographic axes of two tourmaline crystals are perpendicular?

• The light becomes unpolarized

• The light changes color

• The light becomes more intense

• The light disappears