frequency and speed of (a) Reflected
You have learnt in the text how Huygens’ principle leads to the laws of reflection and refraction. Use the same principle to deduce directly that a point object placed in front of a plane mirror produces a virtual image whose distance from the mirror is equal to the object distance from the mirror.
20
Nov
You have learnt in the text how Huygens’ principle leads to the laws of reflection and refraction. Use the same principle to deduce directly that a point object placed in front of a plane mirror produces a virtual image whose distance from the mirror is equal to the object distance from the mirror. and (b) [...]
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 650nm. (b) What is the least distance from the central maximum, where the bright fringes due to both the wavelength coincide ?
20
Nov
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 650nm. (b) What is the least distance from the central maximum, where [...]
In a double slit experiment the angular width of a fringe is found to be 0.2^∘ on a screen placed I m away. The wavelength of light used in 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.
20
Nov
In a double slit experiment the angular width of a fringe is found to be 0.2^∘ on a screen placed I m away. The wavelength of light used in 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 [...]
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.
20
Nov
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. and (b) Refracted light? Refractive index of water [...]
(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 × 10^8 ms^−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?
20
Nov
(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 × 10^8 ms^−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 [...]
Monochromatic light of wavelength 589 nm is incident from air on a water surface. What are the wavelength, frequency and speed of (a) Reflected, and (b) Refracted light? Refractive index of water is 1.33.
19
Nov
Monochromatic light of wavelength 589 nm is incident from air on a water surface. What are the wavelength, frequency and speed of (a) Reflected, and (b) Refracted light? Refractive index of water is 1.33. and (b) Refracted light? Refractive index of water is 1.33. frequency and speed of (a) Reflected Monochromatic light of wavelength 589 [...]