Aagar

Ashok0210

Asked: March 21, 2021In: Class 12 Physics

An angular magnification (magnifying power) of 30X is desired using an objective of focal length 1.25 cm and an eyepiece of focal length 5 cm. How will you set up the compound microscope?

Class 12 Physics CBSE and UP Board Ray Optics and Optical Instruments Chapter-9 Exercise 9.33 NCERT Solutions for Class 12 Physics Chapter 9 Question-33

Ashok0210

Asked: March 21, 2021In: Class 12 Physics

Answer the following questions: (a) The angle subtended at the eye by an object is equal to the angle subtended at the eye by the virtual image produced by a magnifying glass. In what sense then does a magnifying glass provide angular magnification? (b) In viewing through a magnifying glass, one usually positions one’s eyes very close to the lens. Does angular magnification change if the eye is moved back? (c) Magnifying power of a simple microscope is inversely proportional to the focal length of the lens. What then stops us from using a convex lens of smaller and smaller focal length and achieving greater and greater magnifying power? (d) Why must both the objective and the eyepiece of a compound microscope have short focal lengths? (e) When viewing through a compound microscope, our eyes should be positioned not on the eyepiece but a short distance away from it for best viewing. Why? How much should be that short distance between the eye and eyepiece?

Class 12 Physics CBSE and UP Board Ray Optics and Optical Instruments Chapter-9 Exercise 9.32 NCERT Solutions for Class 12 Physics Chapter 9 Question-32

Ashok0210

Asked: March 21, 2021In: Class 12 Physics

What should be the distance between the object in Exercise 9.30 and the magnifying glass if the virtual image of each square in the figure is to have an area of 6.25 mm²? Would you be able to see the squares distinctly with your eyes very close to the magnifier? [Note: Exercises 9.29 to 9.31 will help you clearly understand the difference between magnification in absolute size and the angular magnification (or magnifying power) of an instrument.]

Class 12 Physics CBSE and UP Board Ray Optics and Optical Instruments Chapter-9 Exercise 9.31 NCERT Solutions for Class 12 Physics Chapter 9 Question-31

Ashok0210

Asked: March 21, 2021In: Class 12 Physics

(a) At what distance should the lens be held from the figure in Exercise 9.29 in order to view the squares distinctly with the maximum possible magnifying power? (b) What is the magnification in this case? (c) Is the magnification equal to the magnifying power in this case? Explain.

Class 12 Physics CBSE and UP Board Ray Optics and Optical Instruments Chapter-9 Exercise 9.30 NCERT Solutions for Class 12 Physics Chapter 9 Question-30

Ashok0210

Asked: March 21, 2021In: Class 12 Physics

A card sheet divided into squares each of size 1 mm2 is being viewed at a distance of 9 cm through a magnifying glass (a converging lens of focal length 9 cm) held close to the eye. (a) What is the magnification produced by the lens? How much is the area of each square in the virtual image? (b) What is the angular magnification (magnifying power) of the lens? (c) Is the magnification in (a) equal to the magnifying power in (b)? Explain.

Class 12 Physics CBSE and UP Board Ray Optics and Optical Instruments Chapter-9 Exercise 9.29 NCERT Solutions for Class 12 Physics Chapter 9 Question-29

Ashok0210

Asked: March 21, 2021In: Class 12 Physics

What is the Brewster angle for air to glass transition? (Refractive index of glass = 1.5.)

Class 12 Physics CBSE and UP Board Wave Optics Chapter-10 Exercise 10.8 NCERT Solutions for Class 12 Physics Chapter 10 Question-8

Ashok0210

Asked: March 21, 2021In: Class 12 Physics

In a double-slit experiment the angular width of a fringe is found to be 0.2° on a screen placed 1 m away. The wavelength of light used is 600 nm. What will be the angular width of the fringe if the entire experimental apparatus is immersed in water? Take refractive index of water to be 4/3.

Class 12 Physics CBSE and UP Board Wave Optics Chapter-10 Exercise 10.7 NCERT Solutions for Class 12 Physics Chapter 10 Question-7

Ashok0210

Asked: March 21, 2021In: Class 12 Physics

A beam of light consisting of two wavelengths, 650 nm and 520 nm, is used to obtain interference fringes in a Young’s double-slit experiment. (a) Find the distance of the third bright fringe on the screen from the central maximum for wavelength 650 nm. (b) What is the least distance from the central maximum where the bright fringes due to both the wavelengths coincide?

Class 12 Physics CBSE and UP Board Wave Optics Chapter-10 Exercise 10.6 NCERT Solutions for Class 12 Physics Chapter 10 Question-6

Ashok0210

Asked: March 21, 2021In: Class 12 Physics

In Young’s double-slit experiment using monochromatic light of wavelength λ, the intensity of light at a point on the screen where path difference is λ, is K units. What is the intensity of light at a point where path difference is λ/3?

Class 12 Physics CBSE and UP Board Wave Optics Chapter-10 Exercise 10.5 NCERT Solutions for Class 12 Physics Chapter 10 Question-5

Ashok0210

Asked: March 21, 2021In: Class 12 Physics

In a Young’s double-slit experiment, the slits are separated by 0.28 mm and the screen is placed 1.4 m away. The distance between the central bright fringe and the fourth bright fringe is measured to be 1.2 cm. Determine the wavelength of light used in the experiment.

Class 12 Physics CBSE and UP Board Wave Optics Chapter-10 Exercise 10.4 NCERT Solutions for Class 12 Physics Chapter 10 Question-4

Aagar

An angular magnification (magnifying power) of 30X is desired using an objective of focal length 1.25 cm and an eyepiece of focal length 5 cm. How will you set up the compound microscope?

(a) At what distance should the lens be held from the figure in Exercise 9.29 in order to view the squares distinctly with the maximum possible magnifying power? (b) What is the magnification in this case? (c) Is the magnification equal to the magnifying power in this case? Explain.

What is the Brewster angle for air to glass transition? (Refractive index of glass = 1.5.)

In a double-slit experiment the angular width of a fringe is found to be 0.2° on a screen placed 1 m away. The wavelength of light used is 600 nm. What will be the angular width of the fringe if the entire experimental apparatus is immersed in water? Take refractive index of water to be 4/3.

In Young’s double-slit experiment using monochromatic light of wavelength λ, the intensity of light at a point on the screen where path difference is λ, is K units. What is the intensity of light at a point where path difference is λ/3?

In a Young’s double-slit experiment, the slits are separated by 0.28 mm and the screen is placed 1.4 m away. The distance between the central bright fringe and the fourth bright fringe is measured to be 1.2 cm. Determine the wavelength of light used in the experiment.

Which is the best website providing NCERT Solutions?

NCERT Books

Where can I get NCERT books in PDF format?

NIOS

NCERT Solutions

Sign Up

Sign In

Forgot Password

Tiwari Academy Discussion Latest Questions