Practice BITSAT Physics Wave Optics MCQs provided below. The MCQ Questions for Full Syllabus Wave Optics Physics with answers and follow the latest BITSAT/ NCERT and KVS patterns. Refer to more Chapter-wise MCQs for BITSAT Full Syllabus Physics and also download more latest study material for all subjects
MCQ for Full Syllabus Physics Wave Optics
Full Syllabus Physics students should review the 50 questions and answers to strengthen understanding of core concepts in Wave Optics
Wave Optics MCQ Questions Full Syllabus Physics with Answers
Question: A telescope has an objective lens of 10 cm diameter and is situated at a distance of one kilometer from two objects. The minimum distance between these two objects, which can be resolved by the telescope, when the mean wavelength of light is 5000 Å, is of the order of
- a) 5 cm
- b) 0.5 m
- c) 5 m
- d) 5 mm
Answer: 5 mm
Question: There are two sources kept at distances 2 λ. A large screen is perpendicular to line joining the sources. Number of maximas on the screen in this case is (λ = wavelength of light)
- a) 1
- b) 3
- c) 5
- d) 7
Answer: 3
Question: In the Young’s double-slit experiment, the intensity of light at a point on the screen where the path difference is λ is K, (λ being the wave length of light used). The intensity at a point where the path difference is l/4, will be :[
- a) K
- b) K/4
- c) K/2
- d) Zero
Answer: K/2
Question: A ray of light of intensity I is incident on a parallel glass slab at point A as shown in diagram. It undergoes partial reflection and refraction. At each reflection, 25% of incident energy is reflected. The rays AB and A'B' undergo interference. The ratio of Imax and Imin is :
- a) 49 : 1
- b) 7 : 1
- c) 4 : 1
- d) 8 : 1
Answer: 49 : 1
Question: Calculate the wavelength of light used in an interference experiment from the following data : Fringe width = 0.03 cm. Distance between the slits and eyepiece through which the interference pattern is observed is 1m. Distance between the images of the virtual source when a convex lens of focal length 16 cm is used at a distance of 80 cm from the eyepiece is 0.8 cm.
- a) 0.0006 Å
- b) 0.0006 m
- c) 600 cm
- d) 6000 Å
Answer: 6000 Å
Question: In a YDSE, the light of wavelength l = 5000 Å is used, which emerges in phase from two slits a distance d = 3 × 10–7m apart. A transparent sheet of thickness t = 1.5 × 10–7m refractive index μ = 1.17 is placed over one of the slits. what is the new angular position of the central maxima of the interference pattern, from the centre of the screen? Find the value of y.
- a)
- b)
- c)
- d)
Answer:
Question: A parallel beam of monochromatic light is incident on a narrow rectangular slit of width 1mm. When the diffraction pattern is seen on a screen placed at a distance of 2m. the width of principal maxima is found to be 2.5 mm. The wave length of light is-
- a) 6250 Å
- b) 6200 Å
- c) 5890 Å
- d) 6000 Å
Answer: 6250 Å
Question: In Young's double slit experiment 10th order maximum is obtained at the point of observation in the interference pattern for λ = 7000 Å. If the source is replaced by another one of wavelength 5000 Å then the order of maximum at the same point will be –
- a) 12 th
- b) 14 th
- c) 16 th
- d) 18 th
Answer: 14 th
Question: Young’s double slit experiment is carried out by using green, red and blue light, one color at a time. The fringe widths recorded are βG, βR and βB, respectively. Then
- a) βG > βB > βR
- b) βB > βG > βR
- c) βR > βB > βG
- d) βR > βG > βB
Answer: βR > βG > βB
Question: A single slit diffraction pattern is obtained using a beam of red light. If the red light is replaced by the blue light, then the diffraction pattern
- a) Remains unchanged
- b) Becomes narrower
- c) Becomes broader
- d) Will disappear
Answer: Becomes narrower
Question: In a Young’s double slit experiment the angular width of a fringe formed on a distant screen is 1°. The wavelength fo the light used is 6280 Å. What is the distance between the two coherent sources ?
- a) 0.036 mm
- b) 0.12 mm
- c) 6 mm
- d) 4 mm
Answer: 0.036 mm
Question: If the distance between the first maximum and fifth minimum of a double slit pattern is 7mm and the slits are separated by 0.15 mm with the screen 50 cm. from the slits, then find the wavelength of the light used.
- a) 200 mm
- b) 100 mm
- c) 800 mm
- d) 600 mm
Answer: 600 mm
Question: The diameter of the objective of a telescope is a, its magnifying power is m and wavelength of light is λ, The resolving power of the telescope is:
- a) (1.22λ)/ a
- b) (1.22 a)/ λ
- c) λm / (1.22 a)
- d) a /(1.22 λ
Answer: a /(1.22 λ
Question: When a mica sheet of thickness 7 microns and m = 1.6 is placed in the path of one of interfering beams in the biprism experiment then the central fringe gets at the position of seventh bright fringe. The wavelength of light used will be
- a) 4000 Å
- b) 5000 Å
- c) 6000 Å
- d) 7000 Å
Answer: 6000 Å
Question: In Young's double slit experiment, if the slit widths are in the ratio 1 : 2, the ratio of the intensities at minimum and maximum will be
- a) 1 : 2
- b) 1 : 3
- c) 1 : 4
- d) 1 : 9
Answer: 1 : 9
Question: When the angle of incidence is 60° on the surface of a glass slab, it is found that the reflected ray is completely polarised. The velocity of light in glass is
- a) √2 ×108ms-1
- b) √3 ×108ms-1
- c) 2 ×108ms-1
- d) 3×108ms-1
Answer: √3 ×108ms-1
Question: In a Young's experiment, the separation between the slits is 0.10mm, the wavelength of light used is 600nm and the interference pattern is observed on a screen 1.0 m away. Find the separation between the successive bright fringes
- a) 6.6 mm
- b) 6.0 mm
- c) 6 m
- d) 6 cm
Answer: 6.0 mm
Question: The two coherent sources of intensity that ratio 2 : 8 produce an interference pattern. The values of maximum and minimum intensities will be respectively. Where I1 is the intensity of first source
- a) I1 and 9 I1
- b) 9I1 and I1
- c) 2I1 and 8I1
- d) 8I1 and 2I1
Answer: 9I1 and I1
Question: The first diffraction minima due to a single slit diffraction is at θ =30° for a light of wavelength 5000 Å. The width of the slit is –
- a) 5 × 10–5 cm.
- b) 10 × 10–5 cm.
- c) 2.5 × 10–5 cm.
- d) 1.25 × 105 cm
Answer: 10 × 10–5 cm.
Question: The numerical aperture of a microscope is 0.12, and the wavelength of light used is 600 nm. Then its limit of resolution will be nearly –
- a) 0.3 μm
- b) 1.2 μm
- c) 2.3 μm
- d) 3.0 μm
Answer: 3.0 μm
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Important Practice Resources for BITSAT Physics s
MCQs for Wave Optics Physics Full Syllabus
Students can use these MCQs for Wave Optics to quickly test their knowledge of the chapter. These multiple-choice questions have been designed as per the latest syllabus for Full Syllabus Physics released by BITSAT. Our expert teachers suggest that you should practice daily and solving these objective questions of Wave Optics to understand the important concepts and better marks in your school tests.
Wave Optics NCERT Based Objective Questions
Our expert teachers have designed these Physics MCQs based on the official NCERT book for Full Syllabus. We have identified all questions from the most important topics that are always asked in exams. After solving these, please compare your choices with our provided answers. For better understanding of Wave Optics, you should also refer to our NCERT solutions for Full Syllabus Physics created by our team.
Online Practice and Revision for Wave Optics Physics
To prepare for your exams you should also take the Full Syllabus Physics MCQ Test for this chapter on our website. This will help you improve your speed and accuracy and its also free for you. Regular revision of these Physics topics will make you an expert in all important chapters of your course.
You can get most exhaustive BITSAT Physics Wave Optics MCQs for free on StudiesToday.com. These MCQs for Full Syllabus Physics are updated for the 2025-26 academic session as per BITSAT examination standards.
Yes, our BITSAT Physics Wave Optics MCQs include the latest type of questions, such as Assertion-Reasoning and Case-based MCQs. 50% of the BITSAT paper is now competency-based.
By solving our BITSAT Physics Wave Optics MCQs, Full Syllabus students can improve their accuracy and speed which is important as objective questions provide a chance to secure 100% marks in the Physics.
Yes, Physics MCQs for Full Syllabus have answer key and brief explanations to help students understand logic behind the correct option as its important for 2026 competency-focused BITSAT exams.
Yes, you can also access online interactive tests for BITSAT Physics Wave Optics MCQs on StudiesToday.com as they provide instant answers and score to help you track your progress in Physics.