Ray Optics and Optical Instruments

Related Questions

• A light wave has a frequency of $4 imes {{10}^{14}}$Hz and a wavelength of $5\times {{10}^{-7}}$ meters in a medium. The refractive index of the medium is

  ---

• If ${{I}_{1}}$ and ${{I}_{2}}$ be the size of the images respectively for the two positions of lens in the displacement method, then the size of the object is given by

  ---

• A man is $180cm$ tall and his eyes are $$ below the top of his head. In order to see his entire height right from toe to head, he uses a plane mirror kept at a distance of $1m$ from him. The minimum length of the plane mirror required is

  ---

• If a lens is cut into two pieces perpendicular to the principal axis and only one part is used, the intensity of the image

  ---

• What should be the angle between two plane mirrors so that whatever be the angle of incidence, the incident ray and the reflected ray from the two mirrors be parallel to each other

  ---