The Way Science Works : Final Exam 2015 Jan

1. Describe the general working principle of an amplifier, and give two examples.

2. What are the primary colours of light, pigment and the complementary colour of red ?

3. Why blue skin or hair mammals are extremely rare on earth surface (land).

4. Describe the relation between aperture size and depth of photographs. Draw picture to show how an image form in a pin-hole camera.

5. What are the advantages of using a Number System ?

6. Based on what principle does radio receivers tune to any right station listeners has chosen ?

7. What do communication optics fiber and jewelry diamond have in common ?

8. A radio receiver is not a computer, why does it need some transistors installed ?

9. Why the read/write head of a DVD Drive always requires laser light source instead of LED or light bulb.

10. Describe in detail the procedure of DVD stamp-pressing production method.