Page 577 - MODUL SPEKTRUM FIZIK SPM

(SET 8)

Question Answer Scheme Marks Allocated
(a)(i) MV: Wavelength// l 1
(a)(ii) RV: Distance between two consecutive bright 1
fringes// x// d
(a)(iii) CV: Distance of separation between the double 1
slits// Distance between the double slits and the
screen
(b)(i), (ii) Readings of d and x
Diagram 1.2 d1 = 7.9 cm
x1 = 0.79 cm
Diagram 1.3 d2 = 6.5 cm
x2 = 0.65 cm
Diagram 1.4 d3 = 5.6 cm
x3 = 0.56 cm
Diagram 1.5 d4 = 4.4 cm
x4 = 0.44 cm
Diagram 1.6 d5 = 3.3 cm
x5 = 0.33 cm
(Note: Measurements are based on the printed
version & may differ)

✔1 : 3 readings of d correct
✔2 : All readings of d correct 2

✔1 : 3 readings of x correct 2
✔2 : All readings of x correct (Accept ecf)
(c) Tabulation for l, d and x

l (nm) d (cm) x (cm)
317 3.3 0.33
417 4.4 0.44
542 5.6 0.56
625 6.5 0.65
750 7.9 0.79

✔1 : All headings for l, d and x correct 3
✔2 : All units for l, d and x correct
✔3 : All readings of x consistent to 2 d.p

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