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Mirrors

All articles tagged with #mirrors

automotive1 year ago

Driving Doorless Jeeps: Legalities in the US

Driving a Jeep without doors is legal across all U.S. states, including Pennsylvania, which recently allowed it. However, drivers must comply with state laws regarding mirrors, as most states require at least two mirrors for safe driving. While removing doors can enhance fuel efficiency and provide a unique driving experience, it also increases risks in accidents and may complicate legal claims. To maintain safety, Jeep owners can use replacement mirrors that fit into the door hinges.

via SlashGear|
#automotive#jeep#legal
science1 year ago

Canadian Teenager Builds Working Death Ray for Science Project

Canadian teenager Brenden Sener replicated Archimedes' death ray for a science project using heat lamps and mirrors, finding that the setup significantly increased the temperature of the target. While not attempting to set anything on fire, Sener concluded that with a scaled-up version and a stronger heat source, it would be possible. The historical accuracy of Archimedes' death ray remains debated, with various attempts to recreate it yielding mixed results.

via ScienceAlert|
#archimedes#death-ray#mirrors
astronomy2 years ago

The Challenges of Telescope Technology.

The mirrors at the heart of modern telescopes are delicate and can be defaced by bird residue, frost, and even bullets. However, they are tougher than you might think, and observatories periodically wash and recoat them. The Hubble Space Telescope famously launched with a misshapen mirror in 1990, but astronauts were able to fix it. The James Webb Space Telescope was launched successfully in 2021 but was pelted by a micrometeorite shortly after. The cosmos has a way of guarding its secrets.

via The New York Times|
#astronomy#astrophysics#mirrors
astronomy2 years ago

Revolutionary Membrane Mirrors for Space Telescopes

Researchers have developed a new method to produce and shape large, high-quality mirrors that are much thinner than the primary mirrors previously used for telescopes deployed in space. The mirrors are flexible enough to be rolled up and stored compactly inside a launch vehicle. The researchers used chemical vapor deposition to grow membrane mirrors on a rotating liquid inside a vacuum chamber, which allowed them to form parabolic thin membranes that can be used as the primary mirror of a telescope once coated with a reflecting surface such as aluminum. The new membrane-based mirrors could also be used in adaptive optics systems.

via Phys.org|
#adaptive-optics#astronomy#chemical-vapor-deposition