Ray Optics and Optical Instruments

Related Questions

• A candle placed 25 cm from a lens, forms an image on a screen placed 75 cm on the other end of the lens. The focal length and type of the lens should be

  ---

• The light gathering power of a camera lens depends on

  ---

• Spherical aberration in a lens

  ---

• A convex lens forms a real image of an object for its two different positions on a screen. If height of the image in both the cases be 8 cm and 2 cm, then height of the object is

  ---

• Two thin lenses of focal lengths $f_1$ and $f_2$ are in contact. The focal length of this combination is

  ---