Advertisements
Advertisements
प्रश्न
If the velocity and wavelength of light in air is Va and λa and that in water is Va and λw, then the refractive index of water is ______.
विकल्प
`"V"_"w"/"V"_"a"`
`"V"_"a"/"V"_"w"`
`lambda_"w"/lambda_"a"`
`("V"_"a"lambda)/("V"_"w"lambdaw_"")`
Advertisements
उत्तर
If the velocity and wavelength of light in air is Va and λa and that in water is Va and λw, then the refractive index of water is `underline("V"_"a"/"V"_"w")`.
APPEARS IN
संबंधित प्रश्न
In Fizeau method of measuring the speed of light, the toothed wheel is placed in the focal plane of a converging lens. How would the experiment be affected if the wheel is slightly away from the focal plane?
The speeds of red light and yellow light are exactly same
An illuminated object is placed on the principal axis of a converging lens so that a real image is formed on the other side of the lens. If the object is shifted a little,
In a Michelson experiment for measuring speed of light, the distance travelled by light between two reflections from the rotating mirror is 4.8 km. The rotating mirror has a shape of a regular octagon. At what minimum angular speed of the mirror (other than zero) the image is formed at the position where a nonrotating mirror forms it?
What is the speed of light in a denser medium of polarizing angle 30?
For light incident from air on a slab of refractive index 2, the maximum possible angle of refraction is ______.
An air bubble in a glass slab of refractive index 1.5 (near normal incidence) is 5 cm deep when viewed from one surface and 3 cm deep when viewed from the opposite face. The thickness of the slab is ______.
Describe Fizeau’s method to determine the speed of light.
| A ray of light travels from a denser to a rarer medium. After refraction, it bends away from the normal. When we keep increasing the angle of incidence, the angle of refraction also increases till the refracted ray grazes along the interface of two media. The angle of incidence for which it happens is called critical angle. If the angle of incidence is increased further the ray will not emerge and it will be reflected back in the denser medium. This phenomenon is called total internal reflection of light. |
A point source of light is placed at the bottom of a tank filled with water, of refractive index µ, to a depth d. The area of the surface of water through which light from the source can emerge is:
A ray of light of wavelength 600 nm propagates from air into a medium. If its wavelength in the medium becomes 400 nm, the refractive index of the medium is ______.
