The Way Science Works 103-2 Final Examination Hints

Explain how an amplifier works.

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

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

Why people can not see clearly in water even wearing eye glasses they wear daily.

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

How does a loud speaker work ?

What are the advantages of using a Number System ?

Explain what is a Transistor and how it works.

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

Both TV and Radio Tuners have LC circuits , give the name of phenomenon that makes the selection of particular station/channel frequency possible.

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

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

What is the difference between FM and AM radio ?

Why laser is needed for DVD and LD drive ?

write-once DVD-R and erasable DVD-RW are different in working principles, describe such difference.

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