5) Far point of a person is 5m. In order that he has normal vision what kind of spectacles
should he use [ ]
A) Concave lense with focal length 5m B) concave lense with focal length 10m
C) Convex lense with focal length 5m D) convex lense with focal length 2.5m
6) The process of re-emission of absorbed light in all directions with different intensities by
the atom or molecule is called [ ]
A) Scattering of light B) dispersion of light C) reflection of light D) refraction of
light
Suggested Experiments
1. Conduct an experiment to produce a rainbow in your class room and explain the procedure.
br
(AS3
)
2. Conduct an experiment to find the refractive index of a prism.
3. Conduct an experiment to demonstrate the scattering of the light
Suggested Projects
1) Prisms are used in binoculars. Collect information why prisms are used in binoculars.
(AS4
)
2) Collect the information about different types of eye defects from your nearest eye specialist
or optical shop and write a report
3) Collect the different types of lenses used for correcting the eye defects and write a report.
4) Collect the information about the dispersion phenomenon occurs in the daily life.