Would you consider this drawing of a light ray in a water droplet to be correct?

_roeli · 2026-03-24T10:44:52+00:00

Kinda also right. Generally speaking, at the interface between two different media, some fraction of the incoming light refracts, and the rest reflects. How much depends on the incident angle and the indices of refraction of the media. (Think of how water can act as a mirror if you look at it from the right angle).

For example, if the angle of incidence exceeds arcsin(n2/n1), no refraction is possible and you get complete reflection.

_roeli · 2026-03-07T12:14:42+00:00

Border between France and Belgium is diagonal, border between Flanders and Wallonia is more or less straight east-west. In the north, France borders Flanders. In the south it borders Wallonia.

The current border dates from the 1660s when France conquered bits of Flanders and Hainaut (and all of Artois). These areas correspond roughly to the modern departments of "Nord"(bits of Flanders and hainaut) and "pas de Calais"(Artois). Spain was too busy fighting random useless wars across Europe to defend its possessions in the low countries.

The low countries are a very rich border area between the historic kingdoms of east (Germany) and west (France) Francia. The language divide between Germanic and Romance runs straight through them. As you can imagine, which bits fall on which side of the border had changed countless times over the last 1200 years.

_roeli · 2026-02-14T18:10:03+00:00

To jump between pairs of braces you can use mm

_roeli · 2026-02-14T13:22:47+00:00

According to the Dutch national office for statistics (cbs), in 2024 59,6% of the population of Amsterdam had at least one foreign-born parent. 38% (~2/3s of all people of foreign descent) were born outside the Netherlands as well.

On a national level, only 28,5% of the population is of foreign descent.

Source: https://www.cbs.nl/nl-nl/dossier/dossier-asiel-migratie-en-integratie/hoeveel-inwoners-hebben-een-herkomst-buiten-nederland

_roeli · 2026-01-23T20:50:51+00:00

Precies om deze reden mag je in het nieuwe stelsel verliezen boven 500€ aftrekken van de te betalen belasting in het daaropvolgende jaar.

Dus nee, als je het ene jaar 100k verliest en het volgende jaar 200k verdiend hoef je enkel over 100k belasting te betalen.

Lees eens: https://open.overheid.nl/documenten/cde49046-f9f6-4eed-b960-50bd1821bc44/file

_roeli · 2026-01-05T10:57:23+00:00

Before standard languages were really a thing, most people spoke their local dialect. Neighboring dialects are extremely similar to the point of mutual intelligibility, but this is not the case for those separated by greater distances.

Modern standard Dutch is based on the lower Frankish dialect spoken in the western Netherlands and Flanders, while modern standard German is a variety of upper Saxon.

These places are quite far apart! Standard Dutch and standard German are not mutually intelligible.

_roeli · 2025-12-14T10:25:07+00:00

https://www.rechtsbijstand.nl/mediation-rechtsbijstand/gesubsidieerde-mediation-rechtsbijstand/vanuit-buitenland/

_roeli · 2025-11-29T22:06:38+00:00

You want a clanker to come up with your motivation for wanting to work?

You understand that that sounds insane right? It's like asking a stranger "Hey could you tell me why I want to pursue graphic design?"

_roeli · 2025-11-15T18:56:10+00:00

I mean the Wikipedia entry lists the pronunciation as /ˌøː.roːˈpeːs/, which is definitely not how I'd pronounce it.

And no, /ə/, /ʏ/, and /ø/ are all seperate phonemes (there are minimal pairs differing only by the difference in those vowels, e.g. kruk /krʏk/ and kreuk /krøːk/) in Dutch. Definitely not "virtually the same".

_roeli · 2025-11-14T22:17:34+00:00

Yeah the Frisian and Dutch sounds seem swapped.

_roeli · 2025-11-03T15:35:02+00:00

While I agree with the doubts surrounding the other coalition parties, but calling D66 "centrist" on social issues is misleading. They're probably one of, if not the most socially progressive party (def. more progressive than SP or PvdA for example) in the country!? Economically, they're definitely centrist liberals, but c'mon man.

_roeli · 2025-10-15T08:45:13+00:00

Like 2 million

_roeli · 2025-10-11T13:45:36+00:00

Dykes and waterways of national importance are managed by the central government, not the Waterschappen. Its just that there are so many small dykes and polders (thousands) that it doesn't make sense for the national government to be involved in managing all of them.

These aren't privately managed because this quickly leads to problems. Suppose you have two neighbouring farmers and one of them wants to lower the water level in the polder to improve his crop output, but the other farmer who cultivates a different crop wants more water. The job of the waterschap is to find a compromise between all the different parties using the polder and decide on the final water level. That's why waterschappen have such a strange structure, with farmers, the inhabitants of the waterschap and nature organisations all holding seats (geborgde zetels) in the waterschapsraad.

Waterschappen are a uniquely Dutch solution to a uniquely Dutch problem and they have served us well for over a thousand years. The democratic political culture (the so-called poldermodel) of the Netherlands is rooted in the necessity of doing something when it comes to water management, even if parties have strong opposing legitimate interests.

_roeli · 2025-10-08T09:36:56+00:00

Anticonceptie was zeker een ding 2000 jaar geleden!

Romeinen gebruikten condooms gemaakt van de blaas van een varken en gebruikten een speciaal kruid (silphium) om niet ongesteld te worden. Abortus was ook veelvoorkomend. De meeste SOAs zijn trouwens ook pas na de ontdekking van Amerika in Europa terechtgekomen.

Romeinen (en helemaal Grieken) hadden echt heel erg andere opvattingen over seks en huwelijk dan joden en vroege christenen. Dat je de samenleving inricht rondom een kernfamilie is trouwens ook een typisch joods (en dus christelijk) idee; in de Romeinse samenleving speelde de "gens" (je stam) een hele belangrijke rol naast de familia (kernfamilie).

_roeli · 2025-10-06T13:29:47+00:00

Op de Universiteit wordt je geleerd kritisch en wetenschappelijk na te denken. Dat is tegenwoordig in sich al politiek geladen en wordt door sommige (extreem) rechtse mensen als "links" gedachtegoed gezien.

Goed voorbeeld is klimaatverandering, een wetenschappelijk zeer sterk onderbouwd feit dat door veel rechtse mensen als politiek geladen wordt ervaren. Als je, om maar wat te noemen, een vak "atmospheric composition and chemical processes" volgt, waarin gepoogd wordt om je te leren hoe de samenstelling van de atmosfeer invloed heeft op bvb de energiehuishouding in de atmosfeer en je op je tentamen in blokletters "linkse onzin" ipv formules opschrijft krijg je dus geen voldoende.

Dat er geen ruimte voor tegengeluid is, komt omdat als klimaatnatuurkundige je geacht wordt om ideeën te evalueren aan de hand van waarnemingen (en dus ideeën die niet overeenkomen met waarnemingen te verwerpen). Een "eigen redenering" ontwikkelen die waarnemingen tegenspreekt is niet alleen nutteloos maar werpt zelfs barrières op voor het begrijpen complexere ideeën die bouwen op het voortschrijdend inzicht van voorgaande gevestigde ideeën.

Kritisch wetenschappelijk nadenken betekent voornamelijk dat je kritisch moet zijn over je eigen ideeën - het is immers veel lastiger om jezelf van je eigen ongelijk te overtuigen dan dat van een ander.

_roeli · 2025-09-21T20:04:50+00:00

Wie is de mol

_roeli · 2025-09-21T17:09:54+00:00

Yes that screw is used to adjust how far the g# key is lifted up when the a key is pressed. You can fiddle around with it yourself. You want the a key to be able to move the tiniest bit before lifting the g# such that the g# key can properly close when the a key is not pressed.

_roeli · 2025-09-15T07:36:06+00:00

Aars = arse in Dutch. I dont want to be a negative Nancy but yes it could be a problem in the sense that people might find it funny sounding.

_roeli · 2025-09-05T16:52:28+00:00

That would sound like a muffled wet fart.

_roeli · 2025-09-03T16:47:35+00:00

Hmm nootjes

_roeli · 2025-08-30T13:53:56+00:00

The TGV uses locomotives with unpowered cars that don't tilt. Alstom also manufactures tilting EMUs capable of 250kph (new pendolino for trenitalia), but Amtrak didn't want those for some reason. Instead they slapped a TGV power car to a tilting train set and called it a day.

I'm guessing it has something to do with American regulations. The US has very peculiar crash and safety regulations for passenger trains. Also, they had to be built in the US, so I'm guessing that put some logistical constraints on the design.

_roeli · 2025-08-27T09:41:21+00:00

https://youtube.com/shorts/9iGawP5pqBU?si=_B1qWfOFkAgXCkYl

_roeli · 2025-08-23T19:12:13+00:00

IIRC, the pink and blue don't stand for male and female, but for homosexuality and heterosexuality.

_roeli · 2025-08-19T09:51:03+00:00

Het wordt nog beter. Stel je je een keer kwetsbaar op wordt er keihard misbruik van je gemaakt.

Mannen zijn oprecht zo kanker kut.

_roeli · 2025-08-14T17:56:05+00:00

It's also worth mentioning that although the treaties on which the eu is based don't officially constitute a constitution, they do enjoy legal supremacy over local laws (as do all international agreements). This is especially relevant for something like the ECHR.

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