Physics Optics questions from NEET UG 2014.
A beam of light of $\lambda =600 nm$ from a distant source falls on a single slit $1 mm$ wide and the resulting diffraction pattern is observed on a screen $2 m$ away. The distance between first dark fringes on either side of the central bright fringe is:
In the Young’s double slit experiment the intensity of light at a point on the screen where the path difference is $\lambda$ is $K,$ ( $\lambda$ being the wave length of light used). The intensity at a point where the path difference is $\frac{\lambda }{4},$ will be:
It the focal length of objective lens is increased then magnifying power of:
The angle of a prism is ‘ $A$ ’. One of its refracting surfaces is silvered. Light rays falling at an angle of incidence $2A$ on the first surface returns back through the same path after suffering reflection at the silvered surface. The refractive index $\mu ,$ of the prism is: