White light spectra Flashcards
1
Q
Order and ranges of white light spectra high to low wavelength
A
ROYGBIV Red 700nm Green 560nm Blue 570nm Violet 400nm
2
Q
What deviates more Red or Blue
A
Red since it has greater wavelength
3
Q
Similarities and differences between grating and prisms for obtaining a spectrum
A
Prisms use refraction to obtain spectrum whereas grating uses diffraction and interference
Grating has white light for central order maximum, prism does not
Both create light spectrums, prisms make one, gratings make multiple
In gratings violet deviates the least and red deviated the most as red has greatest wavelength.
In prism violet deviates the most and red the least due to red having lowest frequency.
4
Q
How to decrease uncertainties with gratings
A
Increase m so scale reading uncertainty is less
Increase D for same reason
