Multicolored milk. Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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Multicolored milk. Focus secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

Place a glass of water against a black background in a dark room. Ask the audience a few blank questions, such as: "What color is the water? What color is the milk? Orange, did I hear correctly? Blue?"

Show them “blue milk”: drop a few drops of milk into a glass of water and shine a flashlight on it from the side - the cloudy mixture will look blue against a black background. Add some more milk to the glass, and now you can find the angle of the flashlight light that makes the liquid in the glass look orange.

Focus secret:

Light in water is scattered by milk particles: in the same way it is scattered in air, for example by dust particles. Light rays in the red part of the spectrum are scattered slightly differently than in the blue part.

During the day we see only white light - red is absorbed. However, in the evening, at sunset, sunlight falls at a sharper angle to the Earth's surface and passes through a thicker layer of the atmosphere (at focus, you simulate such an atmosphere by adding milk to water), so blue rays are "deviated" from us, and red rays are "directed" to us.

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Replaceable batteries should become a European standard 24.06.2023

The European Union plans to restore the use of replaceable batteries within the next five years.

The EU is aiming to bring back an old but almost forgotten feature that has all but disappeared from the modern smartphone industry. New rules for the return and replacement of batteries are proposed, which can be implemented by users themselves.

The European Parliament has approved a new regulation that covers the production, design and recycling of all batteries sold in the region. This rule affects not only electric vehicles, but also portable batteries for mobile devices such as smartphones and tablets.

Manufacturers will need to make design changes to allow users to remove and replace batteries themselves. This is in line with the ideas expressed in one of our previous reports on the return of removable batteries.

At the moment, replaceable batteries have been almost completely replaced by sealed battery packs, requiring special tools and knowledge to remove them.

Interestingly, this announcement follows an EU requirement to standardize the USB Type C connector, forcing Apple to adapt its future iPhones and other devices. This change aims to make it easier to recover and recycle old batteries, and to reduce overall waste.

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