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Class 12 Physics: Wave Optics — Chapter Test 1

Class 12 • Physics • Wave Optics • Chapter Test

MediumFREE

15

Questions

20 min

Duration

15

Marks (1 each)

No

Negative marking

Original practice questions with full solutions by ExamPortal.

Instructions

  • • Read each question carefully and pick the correct answer.
  • • You can mark questions for review and come back to them.
  • • Answers are saved automatically.
  • • The test is submitted automatically when time runs out.

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SYLLABUS & QUESTION BLUEPRINT

Sample Practice Questions

Preview 5 sample questions from this 15-question test. Test your knowledge below or take the full exam in timed CBT mode.

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Question 1 of 15
According to Huygens' principle, every point on a wavefront acts as a:
A
sink of energy
B
source of secondary wavelets
C
reflector
D
absorber
View Correct Answer & Step-by-Step Solution
Correct Option:(B)source of secondary wavelets

Detailed explanation is available inside the official test attempt review.

Question 2 of 15
In Young's double-slit experiment, the fringe width is:
A
λdD\frac{\lambda d}{D}
B
λDd\frac{\lambda D}{d}
C
dDλ\frac{d D}{\lambda}
D
λDd\lambda D d
View Correct Answer & Step-by-Step Solution
Correct Option:(B)λDd\frac{\lambda D}{d}

Detailed explanation is available inside the official test attempt review.

Question 3 of 15
Coherent sources are sources that have:
A
the same amplitude only
B
a constant phase difference and the same frequency
C
different frequencies
D
random phases
View Correct Answer & Step-by-Step Solution
Correct Option:(B)a constant phase difference and the same frequency

Detailed explanation is available inside the official test attempt review.

Question 4 of 15
In Young's experiment, if the slit separation dd is doubled, the fringe width:
A
doubles
B
halves
C
stays the same
D
becomes four times
View Correct Answer & Step-by-Step Solution
Correct Option:(B)halves

Detailed explanation is available inside the official test attempt review.

Question 5 of 15
Constructive interference occurs when the path difference is:
A
(2n+1)λ2(2n + 1)\frac{\lambda}{2}
B
nλn\lambda
C
λ4\frac{\lambda}{4}
D
λ3\frac{\lambda}{3}
View Correct Answer & Step-by-Step Solution
Correct Option:(B)nλn\lambda

Detailed explanation is available inside the official test attempt review.

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Frequently asked questions

How many questions are there in Class 12 Physics: Wave Optics — Chapter Test 1?

There are 15 questions to answer in 20 min. Each correct answer gives 1 mark, for a total of 15 marks.

Is there negative marking?

No. Wrong answers do not lose marks, so attempt every question.

Is this mock test free?

Yes, it is completely free. Just log in with your email to start.

What does this test cover?

It covers the chapter "Wave Optics" of Class 12 Physics. All questions are original, with a full solution for each.

Will I see my result and the solutions?

Yes. Right after you submit you get your score, accuracy, rank and percentile, and you can review every question with the correct answer and a step-by-step explanation.

Can I take this test again?

Yes, you can retake it as many times as you like and compare your scores.