Recent questions in Optics

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A ray of light is incident on the hypotenuse of a right-angled prism after travelling parallel to the base inside the prism. If \( \mu \) is the refractive index of the material of the prism, the maximum value of the base angle for which light is totally reflected from the hypotenuse is. (A) \( \sin ^{-1}\left(\frac{1}{\mu}\right) \) (B) \( \tan ^{-1}\left(\frac{1}{\mu}\right) \) (C) \( \sin ^{-1}\left(\frac{\mu-1}{\mu}\right) \) (D) \( \cos ^{-1}\left(\frac{1}{\mu}\right) \)

asked Mar 31 in Optics by gaurav2661 (15 points)

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The magnifying power of a telescope is 9. When it is adjusted for parallel rays, the distance between the objective and eyepiece is 20 cm.

asked Mar 25 in Optics by AirRex1397 (285 points)

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A ray of light is falling on a glass sphere of μ=root(3) such that the incident ray and the emergent ray, when produced, intersect

asked Mar 20 in Optics by AirRex1397 (285 points)

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An object is placed in front of a convex lens. A real inverted image of double its size is formed.

asked Mar 18 in Optics by Rushil07 (15 points)

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The aperture diameter of a telescope is 5 m . The separation between the moon and the earth is 4 × 10 5 k m .

asked Feb 14 in Optics by AirRex1397 (285 points)

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1 एकदा बहव: जना धूमयानम् (रेलगाड़ी) आरुह्य नगरं प्रति गच्छन्ति स्म। तेषु केचित् ग्रामीणा: केचिच्च नागरिका: आसन्। मौनं स्थितेषु तेषु एक Aगगारिक: ग्रामीणान् उपहसन् अकथयत्, "ग्रामीणा: अद्यापि पूर्ववत् अशिक्षिता; अज्ञाश्च सन्ति। न तेषां विकास: अभवतू न च भवितुं शक्नोति।" तस्य तादृशं

asked Feb 12 in Optics by pankaj4946 (20 points)

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For an object placed at a distance 2.4 m from a lens, a sharp focused image is observed on a screen placed at a distance 12 cm from the lens.

asked Dec 9, 2024 in Optics by gaurang8748 (15 points)

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geometrical optics

asked Nov 2, 2024 in Optics by * (15 points)

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An optical arrangement consists of two concave mirrors \( M_{1} \) and \( M_{2} \) and a convex lens \( L \) with a common principal axis, as shown in the figure. The focal length of \( L \) is 10 cm . The radii of curvature of \( M_{1} \) and \( M_{2} \) are 20 cm and 24 cm , respectively. The distance between \( L \) and \( M_{2} \) is 20 cm . A point object \( S \) is placed at the mid-point between \( L \) and \( M_{2} \) on the axis. When the distance between \( L \) and \( M_{1} \) is \( n / 7 cm \), one of the images coincides with \( S \). The value of \( n \) is [JEE (Adv)-2023]

asked Sep 27, 2024 in Optics by md9971 (35 points)

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The magnifying power of a telescope with tube 60 cm is 5. What is the focal length of its eye place?

asked Sep 27, 2024 in Optics by Khusro Mohmmad (30 points)

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6. Find a unit vector along ray for a wavefront, whose equation is \( x^{2}+y^{2}-z=6 \) at the point \( (2,3,7) \).

asked Sep 21, 2024 in Optics by aryan6364 (20 points)

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In Young's double slit experiment, the angular width of fringe from a screen is 0.2°. What is the distance between two slits if the wavelength of light used is 6280 A° a) 0.18 mm b) 1.8 mm c) 0.3 mm d) 1 mm

asked Aug 22, 2024 in Optics by harsh5318 (35 points)

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The difference in optical densities of glass and water with respect to air is 1/6 The velocity of light in water is given by 4 nunord (Cw-Cg) 6 nunord (Cw-Cg) 1/6 nunord (Cw-Cg) 2 nunord (Cw-Cg)

asked Jul 5, 2024 in Optics by harsh5318 (35 points)

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A source is placed at a distance of 25 cm from the convex lens of focal length 15 cm. At what distance should a convex mirror of focal length of 12 cm be placed so that the image is formed at the source A) 13.5 cm from the source toward the right B) 13.5 cm from the lens toward the right C) 3.5 cm from the source between the lens and the source D) none of the above

asked May 29, 2024 in Optics by Latasha Haloi (20 points)

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Optics question

asked May 12, 2024 in Optics by TheLazyNerd (15 points)

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physics optics

asked May 10, 2024 in Optics by xyzqwe (100 points)

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Two spherical shaped equal sized glass fishbowls filled with water are standing on .........

asked May 5, 2024 in Optics by hpatel (15 points)

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Why does R1 also have -ve sign

asked Apr 27, 2024 in Optics by shubham0959 (25 points)

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9. In free space, an electromagnetic wave of \( 3 GHz \) frequency strikes over the edge of an object of size \( \frac{\lambda}{100} \), where \( \lambda \) is the wavelength of the 100 wave in free space. The phenomenon, which happens there will be: (1) Reflection (2) Refraction (3) Diffraction (4) Scattering

asked Mar 28, 2024 in Optics by mohd8027 (25 points)

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9. A ray enters a prism (A-60°) by grazing suffers minimum deviation. The refractive index of prism is (b) 173 (c) 1.41 (d) 1.5

asked Nov 19, 2023 in Optics by kartik7456 (50 points)

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