Is "light cancelling" a thing, similar to noise cancelling?

Greetings /sci/, bit of a newfag here. Lately I've been wanting to independently study physics, but have no experience with reading or annotating on books (or advanced physics), so I would appreciate it if you could recommend me some beginner-level books which cover the topic properly.

Bonus if it has useful diagrams/analoguies and is under $50.

What happens there?

Why is intelligence ultimately determined by genetics but that's not the case for sexuality?

How much of what you believe can you actually prove? I'm not talking about advanced things either. Basic shit like
>the earth is round
>the sun is the center of the solar system
>the universe is expanding
>the holocaust happened
>bush did 9/11
etc

scientists plz explain

I thought the standard model was the most accurate, most precise, most perfect theory ever created in the history of science. /sci/bros how is this possible? Did we get too cocky?

Uh g-guys I just realized that there’s a pattern of 2+ each time you go

1+1=2
2+2=4
3+3=6
4+4=8
5+5=10

Always the answer is + 2 /sci/ I feel like I just cracked the source code of the universe wtf am I going to cease to exist now or something?

Medically related bread, I've had this serious fucking cold on and off for 2 weeks or so
>inb4 covid i tested negative twice a week ago and today
so I figure it could just be bad allergies, not normal for me.
so I get a nettle put thing and fill it with water and put this shit that came with it in it. I figured that the filter on my fridge would be fine (BIG MISTAKE) and I used the nettle pot. HUGE amounts of snot came pouring out of my nose, I figured this was a win. I went to bed, woke up the next morning, my nose is on FIRE my sinuses ACHE my throat feels SINGED. I realized my refrigerator filter was probably not "5 micron".
So I look up the consequences of using unclean water with the nettle pot shit (squirt bottle thing in my case) and it ranges from "severe sinus infection" to "potentially fatal sepsis."
I just want to know, in /sci/'s medical professional opinion, how fucked am I?