Year 10 - Physics -29.4.13

Thai Sikh International School

On-line assignment

Year 10A &B                              Physics                                                 26.04.13

          Fig. shows a ray of light OPQ passing through a semi-circular glass block.

                              

                                 

(a) Explain why there is no change in the direction of the ray at P.

(b) State the changes, if any, that occur to the speed, wavelength and frequency of the light

      as it enters the glass block

(c) At Q some of the light in ray OPQ is reflected and some is refracted.

      On Fig. draw in the approximate positions of the reflected ray and the refracted ray.

      Label these rays.

(d) The refractive index for light passing from glass to air is 0.67.

     Calculate the angle of refraction of the ray that is refracted at Q into air.