On April 9th, it was reported that smartphones have become increasingly addictive, particularly among student demographics, prompting parents and teachers to implement strict controls such as confiscation.
However, a new trend has emerged in the market recently, presenting an "ultimate" solution. Some vendors are modifying smartphones to resemble meal cards, concealing the phone components within molds shaped like meal cards to evade detection.
In addition to the visual disguise, the merchants also removed the polarizing film on the screen. To the naked eye, only a blank white light is visible, but when wearing special polarized glasses, the image becomes visible.
When the backlight of the display is turned on, the light (electromagnetic waves) emitted by the LCD screen is transverse waves propagating forward with vibrations perpendicular to the forward direction (up, down, left, right), hence termed "polarized light".
The human eye cannot perceive this "polarized light," resulting in a white image being seen.
The polarizing film is a transparent film on the surface of a liquid crystal display (LCD) screen that exhibits dichroism, converting polarized light imperceptible to the human eye into recognizable colors, thus creating such a "magical" effect.
Many netizens are concerned about the popularity of these phones, fearing it will seriously affect students' learning and lives.
Furthermore, prolonged wearing of polarized glasses can damage the eyes and have negative impacts on both learning and physical health.
