Tag: optics
Questions Related to optics
The distance between two point sources of light is 24 cm and a converging lens is kept in between two sources. The object distances of two sources from a converging lens of focal length of 9 cm, so that the image distances of two sources are equal
The image of a candle flame formed by a lens is obtained on a screen placed on the other side of the lens. If the image is three times the size of the flame and the distance between lens and image is $80\ cm$, at what distance should the candle be placed from the lens ?
An object of $5\mathrm { cm }$ is placed before a concave mirror at a distance of $40\mathrm { cm } .$ If its focal length is $20\mathrm { cm }$ then what is the magnification of the image.
In displacement method, the distance between object and screen is 96 cm. The ratio of lengths of two images formed by a converging lens placed between them is 4. Then :
A lens forms a real image of an object on a screen placed at a distance of 100 cm from the screen. If the lens is moved by 20 cm towards the screen, another image of the object is formed on the screen. The focal length of the lens is:
An object and a screen are mounted on an optical bench and a converging lens is placed between them so that a sharp image is received on the screen. The linear magnification of the image is 2.5. The lens is now moved 30 cm nearer to the screen and a sharp image is again formed on the screen. The focal length of the lens is:
It is very difficult to see through fog because
Stokes and antistokes line observed in Raman scattering is due to ________ of light.
In Raman scattering, Stokes and Antistokes lines respectively represents lines with ______ and _____ wavelength
In Raman effect, the wavelength of the incident radiation is $5890\overset{o}{A}$. The wavelengths of Stocks and anti-stocks lines are respectively.