Markscheme Pag Qs Paper 2

Question 1

How to do finding refractive index using ray box experiment (3)

Answer 1

Measure angle incident to normal
# increase angle until refracted ray is along boundary
# use formula

Reason semi circle so refraction is same angle initally

Question 2

How to ensure resistance temp is constant for measuring In pags

Answer 2

Water bath which keeps it constant, so the resistance doesn’t change

Question 3

How to show the reflected light as plane polarised

Answer 3

Use a polarising fikter

Rotate and the intensity of light should drop and rise, drop to 0 twice every rotation

Question 4

2 errors that data in a graoh shows

How to fix?

Answer 4

Draw the gradient , and if it should go through 0 but doesn’t, then this is a SYSTEMATIC ERROR
- values higher lower than expected, do somehting to fix each one

2) if the values are spread around the line
- then this means Random error, and hence twke REPEATS

Question 5

When saying x ray how to make, what kind of voltage supply?

Answer 5

Must be HIGH