hello

1.
Go to bed obviously means go to sleep (it doesn't even necessarily have to happen on a bed!)
and go to the bed just means go over to the bed and sit on it.
It wouldn't be said that often. Maybe if you were in a matress store and the salesman said, "Go to the bed you like and test it out!"

"go to bed" means "go to sleep",
"go to the bed" means this, "go to the bed" and stay there.

[1] http://forum.wordreference.com/showthread.php?t=127823&langid=21

go to bed -iść spać
https://www.diki.pl/slownik-angielskiego/?langpair=en%3A%3Apl&q=go+to+bed

go to the bad - iść i usiąść(zrób test wybranego łóżka np. w sklepie:) ) tak jak napisał native speaker

Dodatkowo:

2.
"Go to bed" is generally used to mean to go to sleep in a bed.
I'm going to bed.
She went to bed at 10:30 last night.

"Go to the bed" would mean to travel to a specific bed.
I went to the bed to fix the sheets.
I go to my parents' bed to get the soft pillows.

[2] https://www.englishforums.com/English/GoHospitalHospitalSchoolSchool-Sea/wwzbx/post.htm



pzdr