NCERT Solutions for Class 12 Physics Chapter 9 Ray Optics Instruments
※ Download: http://98009.nnmcloud.ru/d?s=YToyOntzOjc6InJlZmVyZXIiO3M6MTY6Imh0dHA6Ly93aXguY29tMi8iO3M6Mzoia2V5IjtzOjI5OiJSYXkgb3B0aWNzIGNsYXNzIDEyIG5jZXJ0IHBkZiI7fQ==
NCERT Solutions for Class 12 Physics Chapter 9
What is the range of the angles of the incident rays with the axis of the pipe for which total reflections inside the pipe take place, as shown in the figure. Write the expression for current sensitivity of the galvanometer. What is the magnifying power of the telescope? What is the separation between the objective and the eyepiece? Infra-red photography used in foggy days. If the object is moved further away from the lens, then the virtual image will move toward the focus of the lens, but not beyond it. Refractive index of water is 1.
NCERT Class 12 Physics Ray Optics And Optica Instruments NCERT book
The denser the medium, the lesser is the speed of light in it. A circular coil of cross-sectional area 200 sq. Describe the nature and size of the image. In this situation, as you will learn in Chapter 10, a light wave can be considered to travel from one point to another, along a straight line joining them. Question 33 : An angular magnification magnifying power of 30X is desired using an objective of focal length 1. What is the magnifying power of the microscope in each case? How will you set up the compound microscope? Ncert solution class 12 physics includes text book solutions from both part 1 and part 2. The apparent depth of a needle lying at the bottom of the tank is measured by a microscope to be 9.
NCERT Exemplar Solutions, CBSE 12th Physics, Chapter 9
Obtain the ratio of secondary to primary voltage in terms of number of turns and currents in the two coils. The diameter of the moon is , and the radius of lunar orbit is. See of other subjects also. The real image can be obtained on a suitably placed screen, but virtual images cannot. Huygens proposed wave theory of light. All the solutions are explained by experienced subject experts of Physics in a detailed manner.
Ray Optics and Optical class 12 Notes Physics
The distances measured in the same direction as the incident light are taken as positive and those measured in the direction opposite to the direction of incident light are taken as negative Fig. It took some time for people to realise that the speed of light is finite and measurable. It is less than h2. If the radius of curvature of the large mirror is 220 mm and the small mirror is 140 mm, where will the final image of an object at infinity be? Thomas Young, through his double slit experiment, measured the wavelength of light. What is the magnifying power of the telescope? Understanding how light rays can be manipulated allows us to create better contact lenses, fiber optic cables, and high powered telescopes.
NCERT Solutions for Class 12 Physics Chapter 9 Ray Optics Instruments
Now a lens is placed in the path of the convergent beam 12 cm from P. Derive an expression for the width of the central maximum due to diffraction of light at a single slit. Question 37 : A Cassegrain telescope uses two mirrors as shown in Fig. What is the separation between the two lenses? We have already studied that the geometric centre of a spherical mirror is called its pole while that of a spherical lens is called its optical centre. At what distance from the mirror should a screen be placed in order to obtain a sharp image? To achieve this, therefore, the plane mirror is required to rotate about O by half the angle, i. Express refractive index of oil is terms of a and b.
NCERT Solutions Class 12 Physics Chapter 9 Ray Optics
Looking at the rear view mirror, the driver finds that the car following him at a distance of 100 m and is approaching with a speed of 5 kmh - 1. We can assume that light travels in straight lines called rays, disregarding its wave nature. What is the magnifying power of the microscope in each case? Is the system a converging or a diverging lens? Calculate the magnifying power of the microscope, 9. Question 14 : a A giant refracting telescope at an observatory has an objective lens of focal length 15 m. The biggest problems in mathematics exam which a student normally face during the exam are timing, getting wrong answers in. Some questions of this chapter are given here Q. Ignore thickness of the lenses.
Download CBSE NCERT Solutions Class 12 Physics in PDF
At what point does the beam converge if the lens is a a convex lens of focal length 20cm, and b a concave lens of focal length 16cm? What is the area of the surface of water through which light from the bulb can emerge out? When she went to the shopkeeper to order new spects, he suggested that she should get spectacles with plastic lenses instead of glass lenses. Optics Optics is the study of the properties of light, its propagation through different media and its effects. What is the magnifying power of the microscope in each case? Question 7 : Double-convex lenses are to be manufactured from a glass of refractive index 1. To help their students in the proper way, school teachers and mathematics experts are giving good advice to the. Question 11 : A compound microscope consists of an objective lens of focal length 2. A parallel beam of light is incident on a face of the prism. If an eyepiece of focal length 1.
NCERT Class 12 Physics Ray Optics And Optica Instruments NCERT book
Give reason for your answer. Consider the bulb to be a point source. Determine the mass and atomic number of A4 and A. The topics and sub-topics covered in Ray Optics and Optical Instruments Class 12 Notes are: 9. Newton believed that light consisted of a stream of particles, called corpuscles. Rashmi Singh broke her reading glasses. .
Ray Optics And Optical Instruments Class 12 Notes Pdf Download
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. With the plenty of interesting things around, it is very hard for the students to focus on their studies. The energy of each photon is At present, it is believed that light has dual nature, i. Therefore, the red colour will emerge first after travelling through the slab. A wire whose cross sectional area is increasing linearly from its one end to the other, is connected across a battery of V volts.