From the course: Universal Principles of Design
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Blue effects
- [Instructor] Hi. I'm Jill Butler and this is Universal Principles of Design. In this movie, blue effects, or when something is too blue to be true. In Derbyshire, England, there's an abandoned quarry at Harper Hill that flooded years ago. And the swimming hole that was formed looks like a tiny patch of paradise just outside the town of Buxton. Each year, masses of people were drawn to the quarry to swim in its turquoise blue water. Unfortunately, the quarry is surrounded by limestone rocks that leach calcite crystals into the water. And the resulting chemical reaction produces the beautiful blue hue but also a pH level of 11.3, which means the water is highly alkaline and quite toxic. To put that in perspective, ammonia has a pH level around 11.5 and bleach has a pH level around 12.6. The optimum pH level for a swimming pool is 7.4. And, as if it couldn't get any worse, the water in the quarry is polluted with abandoned cars, dead animals, and human waste. So, not surprisingly…
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