# Ray optics class 12 ncert pdf. NCERT Class 12 Physics Ray Optics And Optica Instruments NCERT book 2018-07-28

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The answer is that the wavelength of light is very small compared to the size of ordinary objects that we encounter commonly generally of the order of a few cm or larger. It means a ray incident normally on a boundary, after reflection it retraces its path. Reason Type Questions Instruction : Read assertion and reason carefully, select proper option from given below. Easy to print and read. Click here to see or move to of the page or go to main page.

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## NCERT Class 12 Physics Ray Optics And Optica Instruments NCERT book

R can be obtained using the relation: Let μ2 be the refractive index of the liquid. After travelling through the slab, the first colour to emerge is a blue b green c violet d red Solution: d We know that, when a light ray goes from one medium to other medium, the frequency of light remains constant. English is a global language, so it is very important to learn that subject as it can help. Now a lens is placed in the path of the convergent beam 12 cm from P. Draw ray diagram to show how right angled isosceles prism can be used to: i Deviate the ray through 180°. The light must propagate from optically denser medium to optically rarer medium. This period is high time for every student to start their preparation seriously so that they can score well in their final examinations.

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## NCERT Class 12 Physics Ray Optics And Optica Instruments NCERT book

Derive an expression for the voltage across R when the sliding contact is in the middle of potentiometer wire. As a result, the field of view decreases substantially. How will you set up the compound microscope? It is at same distance behind the mirror as the object is in front of it. The apparent depth of a needle lying at the bottom of the tank is measured by a microscope to be 9. Calculate the speed of light through the prism. Resolving power of telescope Resolving power of telescope is its ability to show distinctly the images of two distant objects lying close by.

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## NCERT Solutions class 12 physics Ray Optics and Optical Instruments

The angle of reflection i. Copies of these textbooks may be downloaded and used as textbooks or for reference. Find the intensity of the light transmitted by P2. When they are on the go for scoring more marks for the main subjects, their performance level and the marks got greatly reduced in English. The length of object is perpendicular to principal axis.

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Describe what happens as the needle is moved farther from the mirror. Is the system a converging or a diverging lens? Determine refractive index of a slab using traveling microscope. That is, in the image the left is turned into the right and vice-versa with respect to object. If an eyepiece of focal length 1. Hence, it has highest speed.

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## NCERT Solutions for Class 12 Physics Chapter 10 Wave Optics in PDF

Since uo is small,f0 will be even smaller. However, we shall restrict our discussion to the special case of curved surfaces, that is, spherical surfaces. If water is replaced by a liquid of refractive index 1. The liquid is removed and the experiment is repeated. Briefly explain the use of Zener diode as a dc voltage regulator with the help of a circuit diagram. Consider the bulb to be a point source. .

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The apparent depth of a needle lying at the bottom of the tank is measured by a microscope to be 9. Describe what happens as the needle is moved farther from the mirror. Describe what happens as the needle is moved farther from the mirror. What happens if the object is moved further away from the lens? Write the expression for current sensitivity of the galvanometer. How much electrostatic energy is stored in the capacitor? If m is negative then the image is real and inverted.

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## NCERT Solutions Class 12 Physics Chapter 9 Ray Optics

What is the magnifying power of the microscope in each case? According to the news, the exam for the matriculation and intermediate schools will be held next year. The expression for refractive index is As the angle of incidence increases, the angle of deviation decreases, reaches a minimum value and then increases. With a common accepted convention, it turns out that a single formula for spherical mirrors and a single formula for spherical lenses can handle all different cases. Give the location of the image and the magnification. What is the separation between the objective and the eyepiece? On getting the new spectacles, she found that the new ones could not offer satisfactory explanation for this. The refracting angle of the prism is 60°.

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## Ray Optics and Optical Instruments Class 12 Notes

A wire whose cross-sectional area is increased linearly from its one end to the other, is connected across a battery of V volts. Question 11 : A compound microscope consists of an objective lens of focal length 2. There are some additional questions based on wave optics are given below with answers. What is the radius of curvature required if the focal length is to be 20cm? Electromagnetic Spectrum The visible light Å to Å forms only a very small range of the total electromagnetic spectrum, as shown in figure. When she went to the shopkeeper to order new spects, he suggested that she should get spectacles with plastic lenses instead of glass lenses. Calculate the maximum value of the current in the coil.

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