Why do laptops have “waves” going across the screen when looking through a phone camera, but they are not seen by our naked eye?
It's called aliasing, or more exactly moire pattern: both camera sensors and LCD screens are made from pixels. Pixels are not contiguous but are made to either display (LCD) or capture (sensors) specific color, like red green or blue. Now when you focus your camera on laptop screen, the individua…
The Short Answer
It's called aliasing, or more exactly moire pattern: both camera sensors and LCD screens are made from pixels. Pixels are not contiguous but are made to either display (LCD) or capture (sensors) specific color, like red green or blue. Now when you focus your camera on laptop screen, the individual pixels on the sensor do not match the pattern of pixels from the LCD – you get a piece of adjacent red or blue pixel or even uneven number of LCD pixels projected onto sensor pixel – that causes unevenness of light exposure and thus a Moire pattern, which you call "wave".
Analysis
Key Concepts: Pixels, pattern, moire
This explanation focuses on pixels, pattern, moire and spans 102 words across 3 sentences. At 36% above the average Technology explanation (75 words), this is one of the more thorough answers in this category, reflecting the complexity of the underlying question.
What This Answer Covers
The explanation opens with: “It's called aliasing, or more exactly moire pattern: both camera sensors and LCD screens are made from pixels.” It then elaborates by presenting a contrasting perspective, ultimately building toward a complete picture across 3 connected points.
How This Compares in Technology
Ranked #130 of 500 Technology questions by answer depth (top 27%). This falls in the detailed tier — above average depth. The explanation goes beyond surface-level but keeps things accessible.
Frequently Asked Questions
Is there a simple explanation for why laptops have "waves" going across the screen when looking through a phone camera, but they are not seen by our naked eye?
It's called aliasing, or more exactly moire pattern: both camera sensors and LCD screens are made from pixels. Pixels are not contiguous but are made to either display (LCD) or capture (sensors) specific color, like red green or blue. Now when you…
How detailed is this explanation compared to similar Technology questions?
This is an above-average answer at 102 words, ranked #130 of 500 Technology questions by depth. The key concepts covered are pixels, pattern, moire.
What approach does this answer take to explain laptops have "waves" going across the screen when looking th?
The explanation uses root cause analysis and contrasting perspectives across 102 words. It is categorized under Technology and addresses the question through 2 analytical lenses.