A student used a device (X) to obtain/focus the image of a well illuminated distant building on a screen

Light (10)

A student used a device (X) to obtain/focus the image of a well illuminated distant building on a screen (S) as shown below in the diagram. Select the correct statement about the device (X).

  1. This device is a concave lens of focal length 8 cm.
  2. This device is a convex mirror of focal length 8 cm.
  3. This device is a convex lens of focal length 4 cm.
  4. This device is a convex lens of focal length 8 cm.

Answer

D

  • Exam Year: 2015