# Physics Questions HELP !

1. Dec 17, 2007

### Jimmy215

Physics Questions HELP!!!!!!!!!!!

1. The problem statement, all variables and given/known data

Questions are True or False I have my Answers but not sure if they are right.

2. Relevant equations

3. The attempt at a solution

Marks: 1 As the size of an opening decreases, the amount of diffraction increases. Answer: True False

2
Marks: 1 Higher frequencies of sound bend through a doorway more easily. Answer: True False

3
Marks: 1 Decreasing the wavelength of the sources causes nodal lines in a two point interference pattern to move closer together. Answer: True False

4
Marks: 1 The secondary maxima in single slit interference are narrower and dimmer than the central maximum. Answer: True False

5
Marks: 1 Destructive interference occurs when the resultant waveform has a smaller amplitude than each individual wave. Answer: True False

6
Marks: 1 Light must be a longitudinal wave since it can be polarized. Answer: True False

7
Marks: 1 Nodal lines occur at points of continual constuctive interference. Answer: True False

8
Marks: 1 A wave travelling along a spring with a wavelength of 2.0 m eneters a second spring where the wavelength becomes 3.0 m. If the speed in the first spring was 4.4 m/s, the speed of the wave in the second spring is:Answer: a. 6.6 m/s
b. 2.9 m/s
c. 0.73 m/s
d. 2.2 m/s

9
Marks: 1 The difference in path lengths from a point on a given nodal line to the two sources in a two point source interference pattern is directly proportional to the wavelength of the sources. Answer: True False

10
Marks: 1 In light, longer wavelengths refract less than shorter wavelengths. Answer: True False

2. Dec 17, 2007

### malty

No can do mate, you must show us your reasoning at least (some of YOUR answers would be nice too), we can't just blanketly hand out the answers!!