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Ashok0210
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Class 12 Physics CBSE and UP Board Ray Optics and Optical Instruments Chapter-9 Exercise 9.22 NCERT Solutions for Class 12 Physics Chapter 9 Question-22

2020-2021cbse and up boardclass 12 chapter-9 physicsclass 12 physicsncert class 12 ray optics and optical instruments
Ashok0210
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(a) Determine the ‘effective focal length’ of the combination of the two lenses in Exercise 9.10, if they are placed 8.0 cm apart with their principal axes coincident. Does the answer depend on which side of the combination a beam of parallel light is incident? Is the notion of effective focal length of this system useful at all? (b) An object 1.5 cm in size is placed on the side of the convex lens in the arrangement (a) above. The distance between the object and the convex lens is 40 cm. Determine the magnification produced by the two-lens system, and the size of the image.

Class 12 Physics CBSE and UP Board Ray Optics and Optical Instruments Chapter-9 Exercise 9.21 NCERT Solutions for Class 12 Physics Chapter 9 Question-21

2020-2021cbse and up boardclass 12 chapter-9 physicsclass 12 physicsncert class 12 ray optics and optical instruments
Ashok0210
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Class 12 Physics CBSE and UP Board Ray Optics and Optical Instruments Chapter-9 Exercise 9.20 NCERT Solutions for Class 12 Physics Chapter 9 Question-20

2020-2021cbse and up boardclass 12 chapter-9 physicsclass 12 physicsncert class 12 ray optics and optical instruments
Ashok0210
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Figure shows an equiconvex lens (of refractive index 1.50) in contact with a liquid layer on top of a plane mirror. A small needle with its tip on the principal axis is moved along the axis until its inverted image is found at the position of the needle. The distance of the needle from the lens is measured to be 45.0 cm. The liquid is removed and the experiment is repeated. The new distance is measured to be 30.0 cm. What is the refractive index of the liquid?

Class 12 Physics CBSE and UP Board Ray Optics and Optical Instruments Chapter-9 Exercise 9.38 NCERT Solutions for Class 12 Physics Chapter 9 Question-38

2020-2021cbse and up boardclass 12 chapter-9 physicsclass 12 physicsncert class 12 ray optics and optical instruments
Ashok0210
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Light incident normally on a plane mirror attached to a galvanometer coil retraces backwards as shown in Figure. A current in the coil produces a deflection of 3.5° of the mirror. What is the displacement of the reflected spot of light on a screen placed 1.5 m away?

Class 12 Physics CBSE and UP Board Ray Optics and Optical Instruments Chapter-9 Exercise 9.37 NCERT Solutions for Class 12 Physics Chapter 9 Question-37

2020-2021cbse and up boardclass 12 chapter-9 physicsclass 12 physicsncert class 12 ray optics and optical instruments
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