Ray Optics and Optical Instruments

Related Questions

• Finger prints on a piece of paper may be detected by sprinkling fluorescent powder on the paper and then looking it into

  ---

• A divergent lens will produce

  ---

• In a plano-convex lens the radius of curvature of the convex lens is 10 cm. If the plane side is polished, then the focal length will be (Refractive index = 1.5)

  ---

• The time taken by sunlight to cross a 5 mm thick glass plate $(\mu =3/2$) is

  ---

• The exposure time of a camera lens at the $\frac{f}{2.8}$ setting is $\frac{1}{200}$ second. The correct time of exposure at $\frac{f}{5.6}$ is

  ---