Two lasers with verynearly the same wavelength can generate a beat frequency if

Question

Two lasers with verynearly the same wavelength can generate a beat frequency if bothlaser beams illuminate a photodetector with a very fast response.In an experiment, one laser's wavelength has been stabilizedat 780.54492 nm. Thesecond laser starts with a longer wavelength that is slowlydecreased until the beat frequency between the two lasersis 82.5 MHz. What is thesecond laser's wavelength? (Express your answer to five decimalplaces.)
the way i understood itthat Fbeat=lf2-f1l so 82.5=340/780-340/x
because when twosound waves of different frequency approach your ear, thealternating constructive anddestructive   interfearanc causes the sound tobe alternatively soft and loud - a phenomenon which is calledbeating. The beat frequency is equal to the absolute value ofthe  diffrance in frequency of the twowaves.
why i keep on getting thiswrong
the way i understood itthat Fbeat=lf2-f1l so 82.5=340/780-340/x
because when twosound waves of different frequency approach your ear, thealternating constructive anddestructive   interfearanc causes the sound tobe alternatively soft and loud - a phenomenon which is calledbeating. The beat frequency is equal to the absolute value ofthe  diffrance in frequency of the twowaves.
why i keep on getting thiswrong

Explanation / Answer

from your formula 82.5 * 10 ^ 6 = [ ( 3 * 10 ^ 8 ) / (780.54492 * 10 ^ -9 ) ] - [ ( 3 * 10 ^ 8 ) / ] solving we get answer i.e. value

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.