# data[].attributes.attachment_link.description
Before a lens can be used to advantage certain facts concerning it must be known to the user. The focus of a very distant point lying on the principal axis of the lens is known as a principal foc...

# data[].attributes.body
Physics Home (p)
https://padlet.com/rdownes/p
Physics transition year (p4y)
https://padlet.com/rdownes/p4y
Physics 5th year (p5y)
https://padlet.com/rdownes/p5y
Physics 6th year (p6y)
https://padlet.com/rdownes/p6y
Physics Books (pb)
https://padlet.com/rdownes/pb
Physics Experiments (pe)
https://padlet.com/rdownes/pe
Physics Tests -by topic (pt)
https://padlet.com/rdownes/pt
Physics Papers (pp)
https://padlet.com/rdownes/pp
Physics Videos (pv)
https://padlet.com/rdownes/pv
Physics Marking -schemes
https://padlet.com/rdownes/pm
Physics Slideshows
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Chapters from Real World Physics
https://padlet.com/rdownes/p1
https://padlet.com/rdownes/p2
https://padlet.com/rdownes/p3
https://padlet.com/rdownes/p4
https://padlet.com/rdownes/p5
https://padlet.com/rdownes/p6
https://padlet.com/rdownes/p7
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https://padlet.com/rdownes/p33
https://padlet.com/rdownes/p00
/p00 is an empty template

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Includes our schedule in blue.