You are Here: Home >< Physics

# Help with Physics question ? watch

1. Hi i'm stuck on this question and the closest I've got to this question is when I converted mm to m wrong -_- lol, Could anyone please help me with this question, thanks I appreciate your time.

ps the answer is 0.75m but I don't know how to get it

Following measurements in a double slit experiment are : slit spacing (s) = 0.4mm, fringe separation w= 1.1mm , wavelength = 590nm, Calculate the distance from the slits to the screen ?

Thanks again

2. to convert nm to meters multiply by 10-9 ... might help to remember that nano sounds a bit like nine
to convert mm to meters multiply by 10-3

first convert everything to SI units, in this case it's all meters, then calculate.
3. (Original post by Joinedup)

to convert nm to meters multiply by 10-9 ... might help to remember that nano sounds a bit like nine
to convert mm to meters multiply by 10-3

first convert everything to SI units, in this case it's all meters, then calculate.
4. (Original post by Joinedup)

to convert nm to meters multiply by 10-9 ... might help to remember that nano sounds a bit like nine
to convert mm to meters multiply by 10-3

first convert everything to SI units, in this case it's all meters, then calculate.

A sodium metal surface is illuminated with incident light of frequency 9.70x10^-14 Hz , The maximum Kinetic energy of an emitted electron is 2.49x10^-19 J , Calculate the wavelength of incident light

5. (Original post by Cinna21)

A sodium metal surface is illuminated with incident light of frequency 9.70x10^-14 Hz , The maximum Kinetic energy of an emitted electron is 2.49x10^-19 J , Calculate the wavelength of incident light

wave speed, frequency and wave length are connected by the formula
c=fλ

are you sure that value for frequency is correct though?
6. (Original post by Joinedup)
wave speed, frequency and wave length are connected by the formula
c=fλ

are you sure that value for frequency is correct though?
Yes the value for frequency is correct

and thanks I got the answers I forgot to convert it to standard form so my answer was not matching the answer, why do I make silly mistakes and worse off it takes me the next day to figure it out Lol , I hope this doesn't happen in my exams , thanks though

### Related university courses

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: November 3, 2015
Today on TSR

### Exam Jam 2018

Join thousands of students this half term

### Solo - A Star Wars Story

Poll

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE