- Print or copy the template provided on thick paper or cardboard.
- Carefully cut out the silhouette of the middle part and the earpieces of the sunglasses.
- Use scissors to cut out the squares in the middle part, where the glasses will be placed.
- Glue pieces of polarised film on the inside of the middle part, aligning them with the cutout squares.
- Fold the middle part along the long side, forming the frame of the sunglasses.
- Fold the left and right extremes of the middle part to attach the sunglasses' earpieces. You can fix them with a clip (for adjustability) or glue.
- Optional: Paint and decorate your sunglasses to make them unique and stylish.
Exploring the Science Behind Polarized Light
Light exhibits an intriguing property known as polarization, which refers to its oscillation in specific planes. When light encounters a polarized film, it permits only light waves travelling in a particular plane to pass through while blocking others. This unique characteristic proves beneficial as it helps reduce glare and safeguards our eyes from intense light, such as sunlight reflecting off smooth surfaces.
The property of light polarization stems from its transverse nature, unlike longitudinal sound waves. Normally, light is unpolarized, indicating that its source oscillates in multiple planes simultaneously. For instance, an ordinary incandescent light bulb emits unpolarized light, similar to the Sun.
Polarization, in essence, involves allowing only waves travelling in a specific plane to pass, as if employing a horizontal slit that permits flat waves while causing others to collide and return. This phenomenon significantly reduces light intensity, ensuring it does not harm our eyes.
When light reflects off nonmetallic surfaces like the smooth water surface of a lake, it becomes partially polarized parallel to the surface.
Given that many exterior surfaces are horizontal, Polaroid glasses are designed with vertical axes to eliminate the horizontal component of strongly reflected light. As a result, these glasses effectively reduce glare and offer enhanced eye protection.
Did you know
- Rods and cones are photoreceptor cells found in the retina of our eyes and are responsible for our vision.
- People who go fishing often wear Polaroid glasses to eliminate glare reflected off the surface of a lake or stream and see more clearly underwater.
Reflection Questions
- How do the Polaroid sunglasses you made reduce glare and protect your eyes from intense light?
- What are the benefits of polarised sunglasses for outdoor activities like fishing or driving?
- How can you apply the concept of polarisation to better understand other natural phenomena?
Safety Note
Always protect yourself from the sun when working outdoors. Look only at the sun with proper sunglasses that provide adequate UV protection. Use scissors and glue with care to avoid accidents.
Additional Activities
Experiment with different tinting options by adjusting the orientation and number of polarised film layers. Compare the intensity of light in each case and discuss the effects of polarization on light transmission.