Q1 of 45 Page 304

The refractive index of diamond is 2.42. What is the meaning of this statement inrelation to the speed of light?

The refractive index of a medium is given by,


Given,


Refractive index of diamond ( = 2.42.


The speed of light in diamond


=


=


Tagging|||Physics||The Human Eye And The Colourful World||Refraction And Dispersion Of Light Through A Prism


Difficulty ||| Easy


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24

What will happen when the frequency of rotation in an AC dynamo is doubled?

 1

Draw the given diagram and label the following in the diagram.


i) Incident ray


ii) Refracted ray


iii) Emergent ray


iv) Angle of refraction


v) Angle of deviation


vi) Angle of emergence


 2

i) Redraw the diagram.


ii) This diagram represents _________


iii) Label the parts of the diagram.


iv) Mention the principle used in the device denoted bythis diagram.


 3

i) Find the nature, position and magnification of the image formed by a convex lens of focal length 10cm, if the object is placed at a distance of a) 15cm b) 8cm

ii) Which of the above represents the use of convex lens in a) A film projector


b) The magnifying glass used by palm reader