https://physics.codidact.com/categories/54/tags/4661.rssNew Posts Tagged 'light' - PhysicsPhysics - Codidact2022-04-25T12:35:06Zhttps://physics.codidact.com/posts/286310Why can someone observe light, even when the light fails to illume that someone? TextKithttps://physics.codidact.com/users/536962022-04-24T17:26:07Z2022-04-25T12:35:06Z<p>I never grokked the optics behind LightHouses and the WW2 poster below work. <a href="https://thumbs.dreamstime.com/b/lighthouse-night-beacon-lighting-dark-sky-31776521.jpg">LightHouse beams</a>...https://physics.codidact.com/posts/286309Why do markers reflect light, even when the light source fails to illumine the space between the source and markers?TextKithttps://physics.codidact.com/users/536962022-04-24T17:08:38Z2022-04-25T12:21:28Z<p>Please see below screenshot of <a href="https://youtu.be/S0Xi7J46hLY?t=959">15:59</a>.The LED spot light (fastened to the front of the boat) illumines merely a few meters in front, and fails to...https://physics.codidact.com/posts/285688Conductivity with angle of lightMissMulanhttps://physics.codidact.com/users/541072022-01-25T14:48:07Z2022-01-26T14:44:50Z<p>In the lab I changed the angle the light hits a photoresistor and it doesnt obey Lambert's cosine law the conductivity of the photoresistor drops fast from +-20 to +-30 degrees angle.Why?</p>
<...https://physics.codidact.com/posts/285294Are lamps, with blistering light bulbs exposed and facing down on the user, dangersome? TextKithttps://physics.codidact.com/users/536962021-12-18T07:08:32Z2021-12-19T14:32:13Z<p>IKEA discontinued this NOVEMBER lamp in 2007, but I still use it. <em>IKEA confirmed that they did not intend or design any cover or share with this lamp, and the light bulb is supposed to be ex...https://physics.codidact.com/posts/280486How can I turn a floor lamp, that lights upward, into a reading light?TextKithttps://physics.codidact.com/users/536962021-01-15T00:19:33Z2021-07-17T09:44:39Z<p>How can I turn this <a href="https://www.flickr.com/photos/89150487@N02/8121062934/sizes/l/">floor lamp</a> into a reading light? I want all light exiting upwards from the lamp shade to point do...