OCR Physics A Exam - G482 Electrons, Waves, Photons [09/06/16]

Original post by Abb97

Oh crap that 1 mark confused me i forgot what to do what did you get for the visible light letter i pit down C and i got C in the question which made you use hf= E1-E2

Defo got C, I put C D and E for visible light though, didn't have a clue xD

Reply 82

Oh and did everyone get 5 for the powers of ten question? I got 4 to start with but I think it depended on what wavelength of visible light you picked

Reply 83

username1969391

Original post by Abb97

Oh crap that 1 mark confused me i forgot what to do what did you get for the visible light letter i pit down C and i got C in the question which made you use hf= E1-E2

Original post by RBoss

Defo got C, I put C D and E for visible light though, didn't have a clue xD

Can't remember what I got for that. All I can remember is that I used 500nm as being the wavelength for visible light and chose the letter closest to that value.

Reply 84

username1969391

Original post by RBoss

Oh and did everyone get 5 for the powers of ten question? I got 4 to start with but I think it depended on what wavelength of visible light you picked

Yeah I got 5

Reply 85

tomoke

Original post by Abb97

Resistance was 67/3 and V was given as 5 so do I=v/r and i was ~220mA therefore i selected 500mA anyone else do this?

This is exactly what I did

Reply 86

Original post by RBoss

Defo got C, I put C D and E for visible light though, didn't have a clue xD

I think it had something to do with A and B having long wavelengths so they must have been radio and microwaves and E/D being gamma and x rays as they had a short wavelength so Visible light is in between these therefore C

Reply 87

tomoke

Original post by RBoss

Oh and did everyone get 5 for the powers of ten question? I got 4 to start with but I think it depended on what wavelength of visible light you picked

I got 5 as well

Reply 88

I put 6 ;_; don't know where 10-7 came from

Reply 89

Original post by Abb97

I think it had something to do with A and B having long wavelengths so they must have been radio and microwaves and E/D being gamma and x rays as they had a short wavelength so Visible light is in between these therefore C

Looking it up, the wavelength from visible light ranges from ~400nm to ~770nm, so this would cover the values for C, D and E

(edited 7 years ago)

Reply 90

When is the unofficial mark scheme coming out?

Reply 91

Reda2

Original post by RBoss

Oh and did everyone get 5 for the powers of ten question? I got 4 to start with but I think it depended on what wavelength of visible light you picked

Yes I got 5 too.

Reply 92

SlippyDuck117

1

What do yo guys think the A grade boundary will be?

Reply 93

Original post by Abb97

When is the unofficial mark scheme coming out?

I saw post by teachercol saying it'll be done tomorrow/tomorrow evening

Reply 94

Reda2

Original post by Abb97

I think it had something to do with A and B having long wavelengths so they must have been radio and microwaves and E/D being gamma and x rays as they had a short wavelength so Visible light is in between these therefore C

visible light has wavelength about 1 x 10^-7 m so I picked the closest to that one, since all of them were 10^-9 I picked the smallest out of them, but was it nano milometer rather than nano meters??

Reply 95

username1969391

Original post by SlippyDuck117

What do yo guys think the A grade boundary will be?

Probably like 67-70

Reply 96