Q3 of 45 Page 302

The ray diagram shown below is introduced to show how a concave mirror forms theimage of an object.


i) Identify the mistake and draw the correct ray diagram.


ii) Write the justifications for your corrections.


i) As the ray of light falls through the focus on the concave mirror, the ray of light passes parallel to the axis.



This the correct ray diagram.


ii)



Upon incidence of the light ray the angle of incidence (i) must be equal to the angle of refraction(r),as shown in the figure above.


More from this chapter

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1

Fill in the blanks

i) For a motor: a permanent magnet, then commercial motor: _______


ii) Focal length of a lens; metre, then for power of a lens____________


 2

Correct the mistakes, if any, in the following statements.

i) The magnetic field is a quantity that has magnitude only.


ii) Outside the bar magnet, the magnetic field lines emerge from the South Poleand merge at the North Pole.


 4

In traffic signals _________ colour light is used to stop vehicles because it has ______wave length. (Hint: scattering of light is inversely proportional to the fourth power of its wavelength)

 5

Fill the table with the appropriate words given in bracket.




(Convex mirror, Plano convex, concave mirror, Plane mirror, convex lens, Concavelens)