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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

Ashok0210

Asked: March 21, 2021In: Class 12 Physics

(a) The refractive index of glass is 1.5. What is the speed of light in glass? Speed of light in vacuum is 3.0 x 10⁸ m s⁻¹) (b) Is the speed of light in glass independent of the colour of light? If not, which of the two colours red and violet travels slower in a glass prism?

Class 12 Physics CBSE and UP Board Wave Optics Chapter-10 Exercise 10.3 NCERT Solutions for Class 12 Physics Chapter 10 Question-3

Ashok0210

Asked: March 21, 2021In: Class 12 Physics

What is the shape of the wavefront in each of the following cases: (a) Light diverging from a point source. (b) Light emerging out of a convex lens when a point source is placed at its focus. (c) The portion of the wavefront of light from a distant star intercepted by the Earth.

Class 12 Physics CBSE and UP Board Wave Optics Chapter-10 Exercise 10.2 NCERT Solutions for Class 12 Physics Chapter 10 Question-2

Ashok0210

Asked: March 21, 2021In: Class 12 Physics

In deriving the single slit diffraction pattern, it was stated that the intensity is zero at angles of nλ/a. Justify this by suitably dividing the slit to bring out the cancellation.

Class 12 Physics CBSE and UP Board Wave Optics Chapter-10 Exercise 10.21 NCERT Solutions for Class 12 Physics Chapter 10 Question-21 Additional Exercise

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Aagar

(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.

(a) The refractive index of glass is 1.5. What is the speed of light in glass? Speed of light in vacuum is 3.0 x 10⁸ m s⁻¹) (b) Is the speed of light in glass independent of the colour of light? If not, which of the two colours red and violet travels slower in a glass prism?

What is the shape of the wavefront in each of the following cases: (a) Light diverging from a point source. (b) Light emerging out of a convex lens when a point source is placed at its focus. (c) The portion of the wavefront of light from a distant star intercepted by the Earth.

In deriving the single slit diffraction pattern, it was stated that the intensity is zero at angles of nλ/a. Justify this by suitably dividing the slit to bring out the cancellation.

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