Ray Optics and Optical Instruments

Related Questions

• In a compound microscope, the intermediate image is

  ---

• A substance is behaving as convex lens in air and concave in water, then its refractive index is

  ---

• The sun's diameter is $1.4\times {{10}^{9}}m$ and its distance from the earth is ${{10}^{11}}m.$ The diameter of its image, formed by a convex lens of focal length $2\,m$will be

  ---

• If the wavelength of light in vacuum be $\lambda$, the wavelength in a medium of refractive index $n$ will be

  ---

• Two lenses of power $6D$ and $– 2D$ are combined to form a single lens. The focal length of this lens will be

  ---