Year 10 - Physics - 4.4.14

Thai Sikh International School

E-Learning Programme – Online Assignment –  04/04/2014

Name :                                                                                                                 Subject :Physics 

      Year   :10 A&B                                                                                              Week  No. :10                                   

1. Fig. shows a ray PQ of blue light incident on the side of a rectangular glass block.

             

(a) (i) By drawing on Fig. 6.1, continue the ray PQ through and beyond the block.

     (ii) Mark the angle of incidence at CD with the letter i and the angle of refraction at CD

          with the letter r.

(b) The speed of light in air is 3.0 x 108 m/s and the speed of light in glass is 2.0 x 108m/s.

      (i) Write down a formula that gives the refractive index of glass in terms of the speeds of light in air  and glass.

                                      refractive index =

(ii) Use this formula to calculate the refractive index of glass.

                                                                                                 

                                                                                                       refractive index = …………………

(c) The frequency of the blue light in ray PQ is 6.0 x 1014 Hz.

      Calculate the wavelength of this light in air.

                                                                                                            wavelength = ……………..……