Question 1
Light from a helium-neon laser with a wavelength of 632.8 nm passes through a double slit. Bright fringes are observed on a screen placed 2.50 m away. If the fringe separation on the screen is 4.50 mm, what is the separation between the two slits?
Correct Answer:
0.352 mm
Question 2
In a Young's double-slit experiment, yellow sodium light of wavelength 589 nm produces an interference pattern where the 3rd order bright fringe occurs at an angle of 0.850°. What is the slit spacing?
Correct Answer:
0.119 mm
Question 3
Monochromatic light of wavelength 520 nm illuminates two narrow slits separated by 0.200 mm. At what distance from the central maximum on a screen 1.80 m away does the 4th dark fringe occur?
Correct Answer:
16.38 mm
Question 4
Two point sources S₁ and S₂ in a ripple tank oscillate in phase with a frequency of 10.0 Hz, producing water waves traveling at 0.400 m s⁻¹. A point P is 0.520 m from S₁ and 0.660 m from S₂. What type of interference occurs at point P?
Correct Answer:
Fully destructive interference because the path difference is 3.5 wavelengths
Question 5
A double slit apparatus immersed in water (refractive index n = 1.33) is illuminated by green light (vacuum wavelength λ₀ = 532 nm). The slits are 0.150 mm apart and the screen is 1.20 m away. What is the fringe separation observed in water?
Correct Answer:
3.21 mm
Question 1
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Prepare with the NCEA Level 3 Physics Practice Questions - New Zealand NCEA Level 3 Physics Examination Exam practice quiz. This question bank includes 100 questions covering frequency, mass, speed, rotational, and light. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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NCEA Level 3 Physics Practice Questions - New Zealand NCEA Level 3 Physics Examination Exam

This practice set contains 100 questions from the matching question bank and focuses on frequency, mass, speed, rotational, and light. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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