Question 3: Electromagnetic Spectrum (6 points) Use the emission spectra shown t

Question

Question 3: Electromagnetic Spectrum (6 points)

Use the emission spectra shown to answer the following questions (note the direction of the wavelength scale):

A. A high school student acquired an emission spectrum of an unknown sample. He knew the unknown sample contained one of the elements, whose spectra are shown above. The emission spectrum of his sample showed a strong emission at 610 nm and 480 nm but not at 670 nm. Which element did his unknown sample contain? (2 points)

B. Element A above has a strong emission around 670 nm. Would this correspond to a red line or a blue line? Explain your answer. (2 points)

C. Element C above has a strong emission line around 570 nm. What frequency does this correspond to? (2 points)

Explanation / Answer

A. The element may be strontium because it shows emission in orange and blue wavelenth which is near to 480nm and 610 nm.
the wavelength range are given below:-
Violet and indigo 400?450 nm
Blue and aqua 450?500 nm
Green 500?570 nm
Yellow and orange 570?610 nm
Red 610 to approximately 750 nm

B. 670nm lies in the red region. So element B corresponds to Red line.

C. 570nm lies in the yellow region. So element C corresponds to Yellow line.

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

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