Friday, February 25, 2011

Lets focus on light and study a little physics.............
REFRACTION OF LIGHT
Velocity of light in air          (Va) = 3 x 10 8   ms-1
Velocity of light in water    (Vw) = 9/4 x 108 ms-1
Velocity of light in glass      (Vg) = 2 x 108 ms-1
Velocity of light in diamond (Vd) = 4/3 x 108 ms-1

·       Light has properties of _____ (discovered by Hughgen) and the properties of particles (discovered by Einstein).
·        Considering light as a wave it has velocity, wavelength and frequency related by the formula v= f x
Sensation connected with frequency light is sight (color).
·       Violet light has higher frequency and smaller wavelength but red light has low frequency and large wavelength.
·       V
I          Descending order        
    B          of frequency                    
G
Y
O
R
Velocity of light depends on the medium.

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