Wave Optics
128 CBSE Class 12 Physics previous year questions (PYQs) from 5 papers, 2022 to 2026, with answers and worked solutions.
About this chapter
- Difficulty: 22 easy · 75 moderate · 31 hard.
- Most-asked subtopics: Interference and Young's Experiment (72), Diffraction (28), Refraction and Reflection of Plane Waves (20).
- Updated 13 September 2026.
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#1ModerateInterference and Young's Experiment
#2EasyRefraction and Reflection of Plane Waves
#3ModerateDiffraction
#4HardRefraction and Reflection of Plane Waves
#5ModerateInterference and Young's Experiment
#6ModerateInterference and Young's Experiment
#7ModerateInterference and Young's Experiment
#8ModerateRefraction and Reflection of Plane Waves
#9ModerateInterference and Young's Experiment
#10ModerateRefraction and Reflection of Plane Waves
#11ModerateInterference and Young's Experiment
#12HardDiffraction
#13ModerateInterference and Young's Experiment
#14ModerateInterference and Young's Experiment
#15ModerateRefraction and Reflection of Plane Waves
#16ModerateInterference and Young's Experiment
#17ModerateInterference and Young's Experiment
#18HardRefraction and Reflection of Plane Waves
#19ModerateInterference and Young's Experiment
#20ModerateInterference and Young's Experiment
#21ModerateDiffraction
#22ModerateInterference and Young's Experiment
#23EasyRefraction and Reflection of Plane Waves
#24ModerateInterference and Young's Experiment
#25ModerateRefraction and Reflection of Plane Waves
#26ModerateInterference and Young's Experiment
#27EasyRefraction and Reflection of Plane Waves
#28ModerateInterference and Young's Experiment
#29EasyInterference and Young's Experiment
#30EasyInterference and Young's Experiment
#31EasyInterference and Young's Experiment
Questions number 13 to 16 are Assertion (A) and Reason (R) type questions. Two statements are given — one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer from the codes (A), (B), (C) and (D) as given below.#32EasyHas imageInterference and Young's Experiment
In a Young's double-slit experiment, the two slits behave as coherent sources. When coherent light waves superpose over each other they create an interference pattern of successive bright and dark regions due to constructive and destructive interference. Two slits 2 mm apart are illuminated by a source of monochromatic light and the interference pattern is observed on a screen m away from the slits as shown in the figure.#33ModerateHas imageInterference and Young's Experiment
In a Young's double-slit experiment, the two slits behave as coherent sources. When coherent light waves superpose over each other they create an interference pattern of successive bright and dark regions due to constructive and destructive interference. Two slits 2 mm apart are illuminated by a source of monochromatic light and the interference pattern is observed on a screen m away from the slits as shown in the figure.#34ModerateHas imageInterference and Young's Experiment
In a Young's double-slit experiment, the two slits behave as coherent sources. When coherent light waves superpose over each other they create an interference pattern of successive bright and dark regions due to constructive and destructive interference. Two slits 2 mm apart are illuminated by a source of monochromatic light and the interference pattern is observed on a screen m away from the slits as shown in the figure.#35ModerateHas imageInterference and Young's Experiment
In a Young's double-slit experiment, the two slits behave as coherent sources. When coherent light waves superpose over each other they create an interference pattern of successive bright and dark regions due to constructive and destructive interference. Two slits 2 mm apart are illuminated by a source of monochromatic light and the interference pattern is observed on a screen m away from the slits as shown in the figure.#36EasyHas imageInterference and Young's Experiment
In a Young's double-slit experiment, the two slits behave as coherent sources. When coherent light waves superpose over each other they create an interference pattern of successive bright and dark regions due to constructive and destructive interference. Two slits 2 mm apart are illuminated by a source of monochromatic light and the interference pattern is observed on a screen m away from the slits as shown in the figure.#37HardDiffraction
#38ModerateHuygens Principle
#39ModerateDiffraction
#40HardRefraction and Reflection of Plane Waves
#41EasyInterference and Young's Experiment
#42EasyDiffraction
#43HardInterference and Young's Experiment
#44EasyInterference and Young's Experiment
For question numbers 13 to 16, two statements are given – one labelled as Assertion (A) and the other labelled as Reason (R). Select the correct answer from the codes (A), (B), (C) and (D) as given below :#45ModerateInterference and Young's Experiment
#46HardInterference and Young's Experiment
#47EasyInterference and Young's Experiment
#48ModerateInterference and Young's Experiment
#49ModerateDiffraction
#50ModerateInterference and Young's Experiment
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