Year 10 - Physics - 24-4-15

Thai Sikh International School

E-Learning Programme – Online Assignment –   dd/mm/yyyy

Name :                                                                           Subject :Physics 

Year   :  10                                                                     Schedule No. : 9                        

ANSWER THE FOLLOWING:

1.How do microwaves cook food?.

2. Why is the color of the sky blue?.

3. How do rainbows form?.

4.How do sunglasses work?.

5.When the speed of light in a vacuum is 3 00 000 000 m/s, what is the speed of light in glass with a refractive index of 1.5?.    

6. A light ray approaches a block of plastic at an angle of incidence of 60⁰. When the refractive index of the plastic is 1.4., what is the angle of refraction?.  

7. The table below represents the range of radiation in the electro magnetic spectrum.

gamma

P

ultraviolet

visible

Q

radio

1.Name the two radiations P and Q.

2. Which of the above radiations has the shortest wavelength?.

3.Which of the above radiations has the lowest frequency?.

4.State two differences between a radio wave  and a sound wave both of wavelength one meter.