# Not really a gemora question

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• #601048
✡onegoal™
Participant

I’m learning meseches sukkah and had some interesting cases, but for one of the cases the following question was relevant: If the sun is directly above my sukkah than the shadow from the schach will be directly below the schach. If the sun is not directly above the sukkah the shadow of the schach will be partially below the schach and partially on the wall of the sukkah. If you make the sukkah taller the shadow from the schach will be less and less in the sukkah and more on the wall, depending on how high you make the sukkah. Now here is my question (if you are following what I’m saying, that is) How far over does the shadow move for every x amount I raise the schach? Is there even a way of calculating this? Thank you in advance.

#834008
dash™
Participant

Just multiply the height of your wall by the cotangent of the angle of the sun over the horizon.

I always get confused about which trig function to use where but I think cotangent is the correct function.

#834009
real-brisker
Member

Well the gemorah explains the mishna, that after 20 amos – ain yoshev btzel suckah ela bitzel difanos. Which means that the reflection from the sun will not hit inside the sukah when the walls are higher than 20 amos. Now you can derive from this that below than 20 amos, the schach will be mitzel (create shade). Now obviously per portionaly, the higher it goes the less you need the schach.

#834010
2qwerty
Participant

So it depends on the degree of the sun which is different for every location and time of day. There is a way to calculate it but not very practical.

#834011
Sam2
Participant

It doesn’t matter. See the Ritva on the first Daf.

#834012
frumnotyeshivish
Participant

It all depends on the location of the sun.

#834013
HaLeiVi
Participant

It depends on the hour of the day. Sure there’s a way to calculate it but first get me the calculations from the zmanim sites.

#834015
MichaelC
Member

Rabbi Falk discusses the length of the schach covering the sukkah, with relevance to the amount a woman must cover her head in his sefer oz lehadar levusha.

#834016
popa_bar_abba
Participant

Rabbi Falk discusses the length of the schach covering the sukkah, with relevance to the amount a woman must cover her head in his sefer oz lehadar levusha.

Maybe its only the threads I’m reading, but you seem a little to involved in tznius issues. I don’t even know why you would have ever read the book, unless you are a woman or paskening for women.

#834017

I don’t think he’s interested in tznius at all. I think he’s maliciously trying to make respected talmidei chachamim look foolish

mods: can’t you just replace ‘Rabbi X/Y/Z’ in his future posts with ‘Rabbi MichaelC’

#834018
sam4321
Participant

According to R’ Zeira what would one do living in a place that the sun is close to the horizon(Alaska)?

#834019

thanks, mods!

#834020
Sam2
Participant

Choca: If you’ve read many of MichaelC’s earlier posts I think you’d see that he’s much more interested in imposing every Chumra of Rabbi Falk’s on everyone rather than to make Rabbi Falk look foolish.

#834021

Sam2: I thought so, too, at first. But his quotes [the ones I noticed] were either invented or totally taken out of context. There is a limit to what I can attribute to abject stupidity, which is why I came to my conclusion above.

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