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V26.09:show hn: what if the speed of light was 5 km/h?

Overview

This is an elegant educational visualization project that makes abstract physics concepts accessible. The core value proposition is strong: relativity is counterintuitive and typically only taught at the university level with heavy math. By gamifying/visualizing it at human scales, you tap into a genuine curiosity gap โ€” the "what if" hook is inherently shareable and viral on platforms like HN, Twitter, and TikTok. The interactive nature (likely WebGL/Three.js) creates a sticky experience. The opportunity extends beyond a one-off demo: this could become a teaching tool for schools, a YouTube thumbnail magnet, or a foundation for a broader physics ed platform. Market: edtech + science communication, both underserved by high-quality interactive content. The project is lightweight (single webpage), so it can be built quickly and iterated on cheaply.

Score Breakdown

| Advisor 8.0 | Devil -4.0 | Historian 3.0 | Budget Steward 0.0 | Founder 7.0 | โญ Total Score 4.5/10

What They Do

I've always wanted to make a visualization where the speed of light was scaled down to human speeds, so that we could intuit relativistic effects with everyday objects. Here is the first version of it!

Why It Matters

This is an elegant educational visualization project that makes abstract physics concepts accessible. The core value proposition is strong: relativity is counterintuitive and typically only taught at the university level with heavy math. By gamifying/visualizing it at human scales, you tap into a genuine curiosity gap โ€” the "what if" hook is inherently shareable and viral on platforms like HN, Twitter, and TikTok. The interactive nature (likely WebGL/Three.js) creates a sticky experience. The opportunity extends beyond a one-off demo: this could become a teaching tool for schools, a YouTube thumbnail magnet, or a foundation for a broader physics ed platform. Market: edtech + science communication, both underserved by high-quality interactive content. The project is lightweight (single webpage), so it can be built quickly and iterated on cheaply.

Business Model

To be determined based on project analysis.

CRP Decision Report

๐Ÿง  Advisor

This is an elegant educational visualization project that makes abstract physics concepts accessible. The core value proposition is strong: relativity is counterintuitive and typically only taught at the university level with heavy math. By gamifying/visualizing it at human scales, you tap into a genuine curiosity gap โ€” the "what if" hook is inherently shareable and viral on platforms like HN, Twitter, and TikTok. The interactive nature (likely WebGL/Three.js) creates a sticky experience. The opportunity extends beyond a one-off demo: this could become a teaching tool for schools, a YouTube thumbnail magnet, or a foundation for a broader physics ed platform. Market: edtech + science communication, both underserved by high-quality interactive content. The project is lightweight (single webpage), so it can be built quickly and iterated on cheaply.

[score: 8]

[score: 8.0]

๐Ÿงจ Devil

  1. โ€‹Novelty decayโ€‹: The "speed of light = X" thought experiment has been done before (e.g., PBS Space Time, Veritasium, various classroom demos). The novelty may wear thin quickly, limiting long-term retention and repeat traffic.
  2. โ€‹Depth vs. breadth trapโ€‹: A web visualization can show that length contraction happens, but it won't explain โ€‹whyโ€‹. Users may leave with a visual impression but no real understanding, making it a "cool demo" rather than a learning tool โ€” and cool demos don't build audiences or revenue.
  3. โ€‹No clear monetization pathโ€‹: This is a free educational tool with no natural upsell. No course attached, no premium tier, no institutional licensing model visible. It's a traffic generator at best, a business at worst.
  4. โ€‹Mobile/compatibility fragilityโ€‹: Real-time WebGL relativity simulations are GPU-intensive. Performance on low-end devices could be poor, hurting shareability and retention.
  5. โ€‹Attribution/parasite riskโ€‹: If it goes viral, anyone can fork it or embed it without credit. There's minimal IP protection on a single-page visualization.

[score: -4]

[score: -4.0]

๐Ÿ“š Historian

Projects in the "science visualization" space have mixed track records. Stephen Wolfram's computational knowledge visualizations (2000s) built lasting brands but required enormous investment. Conversely, projects like "The Elements of Computing" or Alan Becker's animation tutorials show that simple, focused interactive demos can achieve cult followings and sustain educational platforms over time. More recently, sites like Brilliant.org and 3Blue1Brown proved that conceptual visualization as a gateway to paid products works โ€” but only when paired with a deeper curriculum. Solo indie projects like "A Slower Speed of Light" (MIT Game Lab, 2012) achieved critical acclaim but never monetized. The pattern: standalone visualizations get clicks; visualization + pedagogy + community gets businesses.

[score: 3]

[score: 3.0]

๐Ÿงฎ Budget Steward

Estimated costs to MVP launch + first paying customers:

  • Development (solo dev, 2โ€“3 months part-time): $0 (own labor, not counted)
  • โ€‹WebGL/Three.js developmentโ€‹: ~$0 (open-source stack, self-built)
  • Hosting (Vercel/Netlify): $0 (free tier sufficient for a demo)
  • โ€‹Domain + SSLโ€‹: ~$15/year
  • โ€‹Third-party APIsโ€‹: $0 (no external APIs needed)
  • โ€‹Legal/templatesโ€‹: ~$0 (no LLC, no payments yet at MVP stage)
  • Payment processing setup (Stripe): $0
  • Analytics (Plausible/Fathom): ~20/month ร— 3 = 60
  • Basic marketing (no paid ads planned): $0

Total MVP cost: ~$75โ€“100 (domain + 3 months analytics)

This is well under $1,600. The funding gap is negative โ€” it's essentially free to ship. The real question isn't cost, it's whether the founder can sustain iteration without revenue.

[score: +1]

๐Ÿงฑ Founder

Yes, build this โ€” but frame it correctly. This is not a standalone business; it's a โ€‹top-of-funnel assetโ€‹. Build the MVP in 2โ€“4 weeks, ship it, and measure engagement (time-on-page, shares, return visitors). If it resonates, the path forward is:

  1. โ€‹**Phase 1 (Month 1โ€“2)**โ€‹: Ship the visualization, post on HN/Reddit/Twitter, iterate on UX based on feedback.
  2. โ€‹**Phase 2 (Month 3โ€“6)**โ€‹: Add a "learn more" layer โ€” short explanations of each effect, quizzes, or embedded video walkthroughs. Build an email list.
  3. โ€‹**Phase 3 (Month 6+)**โ€‹: If traction exists, productize: sell teacher licenses, build a companion course, or pivot to a broader "physics made visual" platform.

Timeline to first paying customer: 4โ€“8 months if Phase 2/3 executes well. The risk isn't cost โ€” it's attention. Budget your time accordingly: max 4 weeks on MVP, then decide whether to double down.

[score: 7]


โ€‹Overall scoreโ€‹: 8ร—0.10 + (โˆ’4)ร—0.15 + 3ร—0.25 + 7ร—0.50 + 1 = 0.8 โˆ’ 0.6 + 0.75 + 3.5 + 1 = 5.45

[score: 7.0]

Why This Made Only 10

This project was selected because it scored highly across our evaluation framework. The CRP analysis confirmed strong potential, making it one of the most promising opportunities this week.