Question

can anyone help? please.

1. what factors increase the energy in a wave, in terms of frequency, wavelength, and amplitude?

3. why is a scientific law generally accepted as a fact ?

4. sources of a reliable information are government agencies or encyclopedias, why?

5. Light can travel in the air or vacuum and the speed is constant evenif the light source is moving. Why?

Answer 1

1. modulation

Answer 2

whats that?

Answer 3

1: Amplitude is the most general answer, but if you include quantum mechanics then frequency is also a factor.

3: Because the preponderance of the physical evidence supports it. (It would be incorrect to say, "it is confirmed in all cases").

4: They are reviewed by many different groups.

5: This is Einstein's postulate - that the speed of light is constant regardless of the movement of the object or the source. (That's not a very good "why," that's just a "because Einstein said so," but the real answer to "why" would be "Here's a relativity textbook."