Waves

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Question 17

An investigator conducts two trials of a double-slit interference experiment using different configurations. The table below details the wavelength of light used, the slit separation, the distance from the double-slit to the screen, and the resulting fringe width (separation between adjacent bright fringes).

Trial	Wavelength	Slit separation	Screen distance	Fringe width
1	$λ\lambda$	$s$	$D$	3.5 mm
2	$1.2λ1.2\lambda$	1.5s	$0.75 D$	$w_2$

What is the fringe width $w_2\,$ observed in Trial 2?

$mm2.1\text{ mm}$

$mm3.2\text{ mm}$

$mm4.7\text{ mm}$

$mm8.4\text{ mm}$

Waves

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Question 17

An investigator conducts two trials of a double-slit interference experiment using different configurations. The table below details the wavelength of light used, the slit separation, the distance from the double-slit to the screen, and the resulting fringe width (separation between adjacent bright fringes).

Trial	Wavelength	Slit separation	Screen distance	Fringe width
1	$λ\lambda$	$s$	$D$	3.5 mm
2	$1.2λ1.2\lambda$	1.5s	$0.75 D$	$w_2$

What is the fringe width $w_2\,$ observed in Trial 2?

$mm2.1\text{ mm}$

$mm3.2\text{ mm}$

$mm4.7\text{ mm}$

$mm8.4\text{ mm}$

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Question 17

Markscheme

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Question 17

Markscheme

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Question 17

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Question 17

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