Why don't some museums or fancy churches allow flash photography? Plus all the photography terms like ISO, shutter speed, aperture explained like I'm five. Why does it feels like people never smiled in old photos? How did they invent color photography?

 

... We explain like i'm five!

 

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Thank you to the r/explainlikeimfive community, and specifically the following reddit users whose questions and responses formed the basis of this conversation: skimixs, petwins, vanniv_iv, sewcranky, happydenial, coldnoodlesoup, parkinglotranger, chancho600, bulkleather & artgirl6

 

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