The number of surfaces bounding a prism is
  • 1
  • 5
  • 3
  • 6
The wavelengths $\lambda_{v} $, $\lambda_{y}$ and $\lambda_{r}$ corresponding to violet, yellow and red lights are and respectively.
  • $\lambda_{v} < \lambda_{y} < \lambda_{r}$
  • $\lambda_{y} < \lambda_{v} < \lambda_{r}$
  • $\lambda_{y} < \lambda_{r} < \lambda_{v}$
  • $\lambda_{v} > \lambda_{y} > \lambda_{r}$
The combination responsible for admitting different amounts of light into the eye is
  • rods and cones
  • ciliary muscles and crystalline lens
  • ciliary muscles and pupil
  • iris and pupil
When the eye is focused on an object very far away, the focal length of the eye-lens is
  • minimum
  • half its maximum focal length
  • equal to that of the crystalline lens
  • maximum
In the following diagram, the path of a ray of light passing through a glass prism is shown:
  • X, R and T
  • Y, Q and T
  • X, Q and P
  • Y, Q and P
After tracing the path of a ray of light through a glass prism a student marked the angle of incidence (∠i), angle of refraction (∠r), angle of emergence (∠e) and the angle of deviation (∠D) as shown in the diagram. The correctly marked angles are:
  • ∠i and ∠r
  • ∠i and ∠e
  • ∠i, ∠e and ∠D
  • ∠i, ∠r and ∠e
0 h : 0 m : 1 s

Answered Not Answered Not Visited Correct : 0 Incorrect : 0