Here we have a given Class 12 Physics Important Questions for Maharashtra Board HSC Examination 2023. Every students want to score good marks in Class 12 Board Exam,but number of students don't know how to score good marks. Dear students, given following questions had been asked in earlier HSC Board Examinations. From this post, you will know which type of questions had been asked in earlier Board Exams and same questions or same type of questions will be asked in your upcoming examination. If you study all these questions, you will get very good marks in your board examinations, Because so many questions from the following given questions will be asked in your upcoming examination.Therefore go through our Class 12 Physics Important Questions which are given in chapter-wise manner and simply try to solve these questions to score very good marks in Physics and obviously, you will! Best wishes to all dear students for your upcoming Maharashtra State Board Exam 2023.

यहां हमारे पास महाराष्ट्र बोर्ड HSC परीक्षा 2023 के लिए कक्षा 12वीं के Physics के महत्वपूर्ण प्रश्न दिए गए हैं। प्रत्येक छात्र कक्षा 12वीं की बोर्ड परीक्षा में अच्छे अंक प्राप्त करना चाहते हैं, लेकिन कई छात्र यह नहीं जानते कि अच्छे अंक कैसे प्राप्त करें। प्रिय छात्रों, नीचे दिए गए प्रश्न पिछले एचएससी बोर्ड परीक्षाओं में पूछे गए थे। इस पोस्ट से आप जानेंगे कि पिछली बोर्ड परीक्षाओं में किस प्रकार के प्रश्न पूछे गए थे और आपकी आगामी परीक्षा में भी इसी प्रकार के प्रश्न पूछे जाएंगे। यदि आप इन सभी प्रश्नों का अध्ययन करते हैं, तो आप अपनी बोर्ड परीक्षाओं में बहुत अच्छे अंक प्राप्त करेंगे, क्योंकि निम्नलिखित दिए गए प्रश्नों में से बहुत सारे प्रश्न आपकी आगामी परीक्षा में पूछे जाएंगे। इसलिए हमारे कक्षा 12 के भौतिकी के महत्वपूर्ण प्रश्नों को देखें जो अध्याय में दिए गए हैं | फिजिक्स में बहुत अच्छे अंक प्राप्त करने के लिए इन प्रश्नों को बुद्धिमान तरीके से हल करने का प्रयास करें और जाहिर है, आप करेंगे! सभी प्रिय छात्रों को आपकी आगामी महाराष्ट्र राज्य बोर्ड परीक्षा 2023 के लिए शुभकामनाएं।

Class 12 Physics Important Questions | Chapter 7 Wave Optics

• Explain the Huygens construction of spherical wavefront. (March 2012)

• In biprism experiment, a source of light having wavelength 6500 A° is replaced by a source of light having wavelength 5500 A°. Calculate the change in the fringe width, if the screen is at a distance of 1 m from the sources which are 1 mm apart. (March 2012)

• Give analytical treatment of interference bands and hence obtain the expression for fringe width. (March 2012)

• In Young's experiment, the ratio of intensity at the maxima and minima in the interference pattern is 36:16. What is the ratio of the widths of the two slits? (March 2013)

• On the basis of Huygens wave theory of light, prove that velocity of light in a rarer medium is greater that velocity of light in a denser medium. (March 2013)

• A point is situated at 7 cm and 7.2 cm from two coherent sources. Find the nature of illumination at the point if wavelength of light is 4000 A°. (March 2013)

• Explain refraction of light on the basis of wave theory. Hence prove laws of refraction.(March 2013, March 2019)

• The refractive indices of water for red and violet colours are 1.325 and 1.334 respectively. Find the difference between velocities of the rays for these two colours in water. (Oct 2013)

• The minimum angular separation between two stars is 4 x 10-6 rad, if telescope is used to observe them with an objective of aperture 16 cm. Find the wavelength of light used. (Oct 2013)

• If the difference in velocities of light in glass and water is 2.7 x 107 m/s, find the velocity of

light in air. (Refractive index of glass = 1.5, Refractive index of water = 1.333) (March 2014)

• For a glass plate as a polarizer with refractive index 1.633. Calculate the angle of incidence at which light is polarized. (March 2014)

• Draw a neat labelled diagram showing the plane of vibration and plane of polarization for polarized light. (Oct 2014)

Also read : Class 12 Chemistry Important Questions

• State the conditions necessary for obtaining sharp and steady interference pattern. (Oct 2014)

• What is a polaroid? State its two uses. (March 2015)

• If the critical angle of a medium is sin-1 (3/5), find the polarising angle. (March 2015)

• A parallel beam of monochromatic light is incident on glass slab at an angle of incidence 60°. Find the ratio of the widths of the beam in glass to that in air, if refractive index of glass is 1.5. (Oct 2015)

• In a biprism experiment, when a convex lens was placed between the biprism and eyepiece at a distance of 30 cm from the slit, the virtual images of the slits are found to be separated by 7 mm. f the distance between the slit and

biprism is 10 cm and between the biprism and eyepiece is 80 cm, find the linear magnification of the image. (Oct 2015)

• What is 'diffraction of light'? Explain its two types. (March 2016)

• In biprism experiment, 10th dark band is observed at 2.09 mm from the central bright point on the screen with red light of wavelength 6400 A°. By how much will fringe width change if blue light of wavelength 4800 A° is used with the same setting? (March 2016)

• Determine the change in wavelength of light during its passage from air to glass. If the refractive index of glass with respect to air is 1.5 and the frequency of light is 3.5 x 1014 Hz, find the wave number of light in glass. [Velocity of light in air, c = 3 x 108 m/s)] (March 2016)

• Using analytical method for interference bands, obtain an expression for path difference between two light waves. (July 2016)

• A point is situated at 6.5 cm and 6.65 cm from two coherent sources. Find the nature of illumination at the point if wavelength of light is 5000 Å. (July 2016)

• Determine the change in wavelength of light during its passage from air to glass, if the

refractive index of glass with respect to air is 1.5 and the frequency of light is 5 x 1014 Hz. Find the wave number of light in glass (velocity of light in air, c = 3 x 108 m/s). (July 2016)

• Distinguish betweeen the phenomenon of interference of light and diffraction of light. (March 2017)

• The width of plane incident wavefront is found to be doubled on refraction in denser medium. If it makes an angle of 65° with the normal, calculate the refractive index for the denser medium. (March 2017)

• Obtain an expression for path difference and fringe width of interference pattern in Young's double slit experiment. Show that the fringe width is same for consecutive bright and dark bands. (July 2017)

• The refractive indices of glass and water w.r.t. 3/2 and 4/3 respectively. Determine the refractive index of glass w.r.t. water. (July 2017)

• State the conditions to get constructivve and destructive interference of light. (March 2018)

• In a biprism experiment, light of wavelength 5200 A° is used to get an interference pattern on the screen. The fringe width changes by 1.3 mm when the screen is moved towards biprism by 50 cm. Find the distance between two virtual images of the slit. (March 2018)

• The refractive indices of water and diamond are 4/3 and 2.42 respectively. Find the speed of light in water and diamond. (c = 3 x 108 m/s) (March 2018)

• Determine the change in wavelength of light during its passage from air to glass, if the refractive index of glass with respect to air is 1.5 and frequency of light 4 x 1014 Hz. (c = 3 x 108 m/s) (July 2018)

• The optical path difference between two identical waves arriving at a point is 371λ. Is the point bright or dark? If the path difference is 0.24 mm, calculate the wavelength of light used. (July 2018)

• In Young's experiment interference bands were produced on a screen placed at 150 cm from two slits, 0.15 mm apart and illuminated by the light of wavelength 6500 A°. Calculate the fringe width. (March 2019)

• Two coherent sources of light having intensity 81:1 produce interference fringes. Calculate the ratio of intensities at the maxima and minima in the interference pattern. (March 2019)

• Monochromatic light of wavelength 4300 Å falls on a slit of width 'a'. For what value of 'a' the first maximum falls at 30°? (March 2019)

• State Brewster's law and show that when light is incident at polarizing angle, the reflected and refracted rays are mutually perpendicular to each other. (March 2019)

• Give the analytical treatment for interference bands. Hence obtain an expression for path difference between the interfering waves. (July 2019)

• Explain Rayleigh's criterion for the resolution of two close point objects, when their images are

i. just resolved,

ii. well resolved and

iii. unresolved. (July 2019)

• A parallel beam of monochromatic light is incident on a glass slab at an angle of incidence 30°, gets refracted through an angle of 19° 28'. Find the ratio of width of parallel beam in air to that in glass. (July 2019)

• State the factors on which resolving power of microscope depends. How can it be increased? (March 2020)

• If the difference in the velocities of light in glass and water is 0.25 x 108 m/s, calculate the velocity of light in air. Given that refractive index of glass and water with respect to air are 1.5 and 4/3 respectively. (March 2020)

• In a biprism experiment, light of wavelength 5200 A° is used to obtain an interference pattern on the screen. The fringe width changes by 1.3 mm when the screen is moved towards the biprism by 50 cm. Calculate the distance between the two virtual images of the slit. (March 2020)

Also read : Class 12 Biology Important Questions

👉 Students are suggested to go through our Class 12 Physics Important Questions to score more in your upcoming 2023 Board Examination. 👇👇