/u/hatsune_aru's posts in /r/askscience

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Variable ND Photographic Filters: with wide angle lenses, they cast a cross pattern. Why does this happen?

8 upvotes

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A lot of things are notated with decibels. If I learned anything, dB's are referenced to some reference value. What are the reference values for various fields?

1 upvotes

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How are we quite certain that mRNA vaccines won't have long term side effects that crop up years down the line?

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Positive gauge pressure within human/mammal lungs: are there studies examining the effects of breathing in pressurized air?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Variable ND Photographic Filters: with wide angle lenses, they cast a cross pattern. Why does this happen?	8
A lot of things are notated with decibels. If I learned anything, dB's are referenced to some reference value. What are the reference values for various fields?	1
How are we quite certain that mRNA vaccines won't have long term side effects that crop up years down the line?	1
Positive gauge pressure within human/mammal lungs: are there studies examining the effects of breathing in pressurized air?	1