answer all the question pleas QUES TION 1 14 A laser light has a frequencey of 4

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answer all the question pleas

QUES TION 1 14 A laser light has a frequencey of 42x 10"Hz. What is its wavelength in nanometer? 714.2 QUES TION 2 Constructive interference occurs when the phase difference between two waves is _L (n is any integer) 2 x nx TT o (2n +1) • 2) 2n + " QUESTION 3 The laser used in this lab has a known wavelength of 650nm. The wavelength from you experiment turns out to be 618nm. What is the percent error ? (Percent error can be a positive, negative, or zero value. Please refer to the lab handout) QUES TION 4 For two traveling waves, if the crest of one wave coincides with the crest of anotherwhat type of interference occurs? o Constructive 0 Destructive

Explanation / Answer

1. wavelength= speed of light/frequency = 3 x 108/4.2 x 1014 = 714.2 nm

2. 2npi

3. 4.92 %

4. Constructive

5. distance between two slits

6. Destructive intereference

7. all of the above

8. Light is a transverse wave not longitudnal (hence False)

9. Peaks are closely spaced

10. Not neccesarily, hence False

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