UNIT 12 GEOMETRICAL OPTICS

UNIT 12

GEOMETRICAL OPTICS

 

After studying this unit. students will be able to:

•      describe the terms used in reflection including normal, angle of incidence, angle of reflection and state laws of reflection.

•      solve problems of image location by spherical mirrors by using mirror formula.

•      define the terminology for the angle of incidence i and angle of refraction r and describe the passage of light through parallel-sided transparent material.

•      solve problems by using the equation sin i /sin r = n (refractive index).

•      state  the conditions for total internal reflection.

•      describe  the passage of light through a glass prism.

•      describe how total internal reflection is used in light propagation through optical fibres.

•      describe  how light is refracted through lenses.

•      define power of a lens and its unit.

•      solve problems of image location by lenses using lens formula.

•      define the terms resolving power and magnifying power.

•      draw ray diagram of simple microscope and mention its magnifying power.

•      draw ray diagram of compound microscope and mention its magnifying power.

•      draw ray diagram of a telescope and mention its magnifying power.

•      draw ray diagrams to show the formation of images in the normal eye, a short-sighted eye and a long-sighted eye.

describe the correction of short-sight and long-sight.

 

 

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