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AP Physics 2: Algebra-Based Practice Quiz: Double-Slit Interference and Diffraction Gratings

Written by AP Content Team, Verified for 2026 AP Exams, Last updated: June 2026

Test your understanding with short quizzes. This quiz has 11 questions to check your progress.

Question 1 of 11

The interference pattern produced when light passes through a double slit is considered strong evidence for which of the following?

All Questions (11)

The interference pattern produced when light passes through a double slit is considered strong evidence for which of the following?

A) Light has particle properties.

B) Light has wave properties.

C) Light travels in straight lines.

D) Light is composed of different colors.

Correct Answer: B

According to the provided content, 'Interference patterns produced by light interacting with a double slit indicate that light has wave properties.'

The pattern observed on a screen from monochromatic light passing through two slits is a result of what combination of phenomena?

A) Reflection and refraction

B) Diffraction and polarization

C) Wave diffraction and wave interference

D) Refraction and interference

Correct Answer: C

The provided text states, 'The pattern resulting from monochromatic light... incident on two slits... is caused by a combination of wave diffraction and wave interference.'

Which of the following best describes a diffraction grating?

A) A single opening that diffracts light into a wide pattern.

B) A prism that separates light into its constituent colors.

C) A collection of evenly spaced parallel slits.

D) Two slits separated by a large distance.

Correct Answer: C

The content defines a diffraction grating as 'a collection of evenly spaced parallel slits or openings'.

If one were to consider only the effects of wave interference from a double-slit experiment, what characteristic would the resulting pattern of maxima exhibit?

A) A single, bright central maximum.

B) Randomly spaced maxima.

C) Maxima that decrease in intensity rapidly.

D) Uniformly spaced maxima.

Correct Answer: D

The text specifies that 'When only considering wave interference, a double slit creates a pattern of uniformly spaced maxima.'

When a wave passes through multiple openings, what is the resulting pattern called?

A) An absorption spectrum

B) A diffraction pattern

C) A reflective pattern

D) A shadow

Correct Answer: B

The first point in the content states that passing a wave through multiple openings results in a 'diffraction pattern'.

How is the interference pattern from a diffraction grating formed?

A) By the reflection of light off a single mirrored surface.

B) By the refraction of light through a single lens.

C) By the combination of numerous diffraction patterns superimposed on each other.

D) By the filtering of all but one wavelength of light.

Correct Answer: C

The provided content explains that a diffraction grating produces 'an interference pattern that is the combination of numerous diffraction patterns superimposed on each other.'

In the context of a double-slit experiment with monochromatic light, what does the variable 'd' represent?

A) The wavelength of the light.

B) The distance between the two slits.

C) The width of a single slit.

D) The distance from the slits to the screen.

Correct Answer: B

The content describes the setup as 'monochromatic light of wavelength λ incident on two slits a distance d apart'.

A student observes that the interference pattern from a double slit is not composed of uniformly bright maxima; instead, the bright fringes vary in intensity. This observation is best explained by the fact that the overall pattern is a...

A) result of light's particle nature.

B) combination of diffraction and interference.

C) product of reflection and refraction.

D) consequence of using non-monochromatic light.

Correct Answer: B

The provided text states that the pattern from a double slit is caused by a 'combination of wave diffraction and wave interference'. The interference creates the fringes, and the diffraction from each slit modulates their intensity, causing the non-uniform brightness.

What is the key physical difference between a standard double-slit apparatus and a diffraction grating?

A) A grating uses reflection while a double slit uses transmission.

B) A grating consists of many slits, whereas a double slit has only two.

C) A grating only works with white light, while a double slit requires monochromatic light.

D) A grating is made of glass, while a double slit is made of metal.

Correct Answer: B

The content defines a double slit as having 'two slits' and a diffraction grating as 'a collection of evenly spaced parallel slits', implying many more than two.

The behavior of a wave passing through multiple openings, such as a diffraction grating, results in a pattern that is a superposition of...

A) multiple absorption spectra.

B) numerous individual shadows.

C) numerous diffraction patterns.

D) multiple refracted beams.

Correct Answer: C

The content explicitly states that a diffraction grating produces an interference pattern that is 'the combination of numerous diffraction patterns superimposed on each other.'

Which statement accurately describes the relationship between the phenomena occurring in a double-slit experiment?

A) Wave interference is the sole cause of the observed pattern.

B) Wave diffraction is the sole cause of the observed pattern.

C) The pattern is a superposition of a diffraction pattern and an interference pattern.

D) The pattern is caused by the interference of two separate diffraction gratings.

Correct Answer: C

The content states that the pattern from a double slit is 'caused by a combination of wave diffraction and wave interference.' This implies a superposition of the two effects.