Physics

h26

13

The answer is E. Can somebody please help me answer this?

Reply 1

username3442196

8

I get really confused by Cd, lux and lumen - sorry.
I found on the internet (wonderful thing!) that lux = Cd / distance squared, so that's why the answer's E.
Do you have notes to help explain Cd, lux and lumen?

Reply 2

h26

OP

13

Original post by old_teach

I get really confused by Cd, lux and lumen - sorry.
I found on the internet (wonderful thing!) that lux = Cd / distance squared, so that's why the answer's E.
Do you have notes to help explain Cd, lux and lumen?

Hi, thanks for your reply :smile:

Can you please help me with this one too?

Unsharpness of X ray image cannot induce?
ans: beta rays, gamma rays

Not sure what they mean.

Here it is (the notes:

Reply 3

h26

OP

13

Ah I just realised teh attachment is really small

(edited 5 years ago)

Reply 4

username3442196

8

Not sure this makes sense as a question! "Unsharpness of X ray image cannot induce?"

Reply 5

h26

OP

13

Not sure why it does this when i try and attach the file :/

Reply 6

h26

OP

13

Original post by old_teach

Not sure this makes sense as a question! "Unsharpness of X ray image cannot induce?"

Yes, i don't understand that either - I guess Ill just leave that one caused it is worded really badly. But thanks a lot for helping

it isn't letting me attach my notes for some reason :frown:

Reply 7

username3442196

8

Sorry - there's lots of stuff about lumen and lux and solid angle and loads of confusing stuff, and it just confuses me! I hope you don't have to learn it all! I've done physics for many years and never got my head around it. There's always a chance a younger expert may post an explanation!

Reply 8

h26

OP

13

Original post by old_teach

Sorry - there's lots of stuff about lumen and lux and solid angle and loads of confusing stuff, and it just confuses me! I hope you don't have to learn it all! I've done physics for many years and never got my head around it. There's always a chance a younger expert may post an explanation!