This question tests understanding of diffraction. Diffraction is the spreading of waves through openings, with the amount of spreading depending on the ratio of wavelength to opening size. Setup 1, with longer wavelength waves passing through the same slit width, will show greater diffraction because the wavelength is larger relative to the slit width. The diffraction angle is proportional to λ/a, where λ is wavelength and a is slit width, so larger wavelengths produce more spreading. Choice B represents the misconception that smaller wavelengths diffract more, but actually smaller wavelengths relative to the opening result in less spreading. Remember that diffraction is strongest when the opening is comparable to the wavelength.

This question tests understanding of diffraction. Diffraction is the spreading of waves when they pass through openings, with maximum spreading occurring when the opening size is comparable to or smaller than the wavelength. The narrow gap between piers causes significant spreading because its width is about equal to λ, creating strong diffraction. The waves spread out in a semicircular pattern beyond the gap, reaching areas that would be in shadow if waves traveled only in straight lines. Choice B incorrectly suggests that wave amplitude affects diffraction, but diffraction depends solely on the geometric relationship between wavelength and opening size, not on wave intensity. Remember that diffraction is strongest when the opening is comparable to the wavelength.

This question tests understanding of diffraction. Diffraction is the spreading of waves when they pass through an opening or around an obstacle, and the amount of spreading depends on the ratio of wavelength to opening size. When the slit width is comparable to the wavelength, significant diffraction occurs, with maximum spreading when the slit becomes narrower relative to the wavelength. The wave spreads out more with a narrower slit because the opening constrains the wavefront more severely, causing greater bending. Choice B incorrectly suggests amplitude affects diffraction, which is a common misconception - diffraction depends only on the wavelength-to-opening ratio, not on wave intensity. To maximize diffraction, make the opening size comparable to or smaller than the wavelength.

This question tests understanding of diffraction. Diffraction is the spreading of waves when they pass through openings, with maximum spreading occurring when the opening size is comparable to the wavelength. When the opening width approximately equals λ, the transmitted waves spread into a nearly semicircular pattern, indicating strong diffraction. This happens because the opening acts almost like a point source, allowing waves to spread in all forward directions. Choice B incorrectly suggests that much larger openings cause more diffraction, but when the opening is much larger than the wavelength, waves pass through with minimal bending. The fundamental principle is that diffraction is strongest when the opening is comparable to the wavelength.

This question tests understanding of diffraction. Diffraction through a single slit produces a pattern whose spread depends on the ratio λ/a, where λ is wavelength and a is slit width. The angular position of the first minimum is given by sin θ = λ/a, so decreasing the slit width a while keeping λ constant increases the angle θ, making the pattern spread out more. This occurs because a narrower slit constrains the wavefront more, causing greater bending as waves emerge. Choice B incorrectly assumes amplitude affects diffraction spreading, but diffraction patterns depend only on the wavelength-to-slit ratio, not on wave intensity. To increase diffraction spreading, decrease the slit width relative to the wavelength.

This question tests understanding of diffraction. Diffraction patterns depend on the ratio of wavelength to slit width (λ/a), which determines the angular width of features like the central maximum. When only the light intensity is changed while keeping wavelength and slit width constant, the λ/a ratio remains unchanged, so the angular width of the central maximum stays the same. The pattern becomes brighter but maintains the same angular dimensions. Choice A incorrectly suggests intensity affects diffraction angle, but intensity only affects brightness, not the geometric spreading of the pattern. The key principle is that diffraction geometry depends only on the wavelength-to-opening ratio, not on wave intensity.

This question tests understanding of diffraction. Diffraction occurs when waves encounter an opening or obstacle, with the amount of spreading determined by the ratio λ/w, where λ is wavelength and w is the opening width. When wavelength increases while the slit width remains constant, the ratio λ/w increases, resulting in greater diffraction and more spreading of the waves. In this case, doubling the wavelength from λ to 2λ while keeping w constant doubles the ratio λ/w, causing increased spreading. Choice C incorrectly assumes that diffraction depends only on slit width, ignoring the crucial role of wavelength - this represents a misconception about what controls diffraction. The transferable strategy is that diffraction increases when wavelength increases relative to the opening size.

This question tests understanding of diffraction. Diffraction is the bending and spreading of waves as they pass through openings, with maximum spreading when the opening is comparable to or smaller than the wavelength. The ocean waves have wavelength 20 m, while Case 1 has a 5 m gap (much smaller than wavelength) and Case 2 has a 40 m gap (larger than wavelength). Case 1 produces greater diffraction because the gap (5 m) is much smaller than the wavelength (20 m), causing waves to spread dramatically into the sheltered region. Choice A incorrectly claims wider gaps increase diffraction, but actually narrower gaps relative to wavelength increase diffraction. The principle is that diffraction is strongest when the opening is comparable to or smaller than the wavelength.

This question tests understanding of diffraction. Diffraction is the spreading of light as it passes through slits, with the angular width of the central maximum proportional to λ/a (wavelength divided by slit width). Since red light has a longer wavelength than violet light (λR > λV) and both pass through identical slits of width a, red light has a larger λ/a ratio and produces a wider central maximum. Choice A incorrectly claims higher frequency increases diffraction, but higher frequency means shorter wavelength, which actually decreases diffraction for a fixed slit width. The key principle is that diffraction increases as wavelength increases relative to the opening size.

This question tests understanding of diffraction. Diffraction is the bending and spreading of waves as they pass through an opening, with the effect being most pronounced when the opening width w is small compared to the wavelength λ. In Setup A, w = λ/3 means the opening is much smaller than the wavelength, causing significant diffraction and spreading. In Setup B, w = 4λ means the opening is much larger than the wavelength, resulting in minimal diffraction with waves continuing mostly straight. Choice A represents a common misconception that larger openings cause more bending, when the opposite is true - smaller openings relative to wavelength cause greater diffraction. The key principle is that diffraction is strongest when the opening is comparable to or smaller than the wavelength.