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Question 18N.1.SL.TZ0.16

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Date November 2018 Marks available [Maximum mark: 1] Reference code 18N.1.SL.TZ0.16
Level SL Paper 1 Time zone TZ0
Command term Question number 16 Adapted from N/A
16.
[Maximum mark: 1]
18N.1.SL.TZ0.16

In a double-slit experiment, a source of monochromatic red light is incident on slits S1 and S2 separated by a distance d . A screen is located at distance x  from the slits. A pattern with fringe spacing y  is observed on the screen.

Three changes are possible for this arrangement

I.    increasing x

II.   increasing d

III.  using green monochromatic light instead of red.

Which changes will cause a decrease in fringe spacing y ?

 

A.   I and II only

B.   I and III only

C.   II and III only

D.   I, II, and III

[1]

Markscheme

C

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