How does continuous wedge filter differ from normal interference filter used in absorption spectroscopy?
A. It permits continuous selection of different wavelength
B. It allows narrow band of wavelengths to pass
C. It has two semi-transparent layers of silver
D. Space layer is made of a substance having low refractive index
Answer:A
How does continuous wedge filter differ from normal interference filter used in absorption spectroscopy?
A. It permits continuous selection of different wavelength B. It allows narrow band of wavelengths to pass C. It has two semi-transparent layers of silver D. Space layer is made of a substance having low refractive index
Explanation: It allows continuous selection of wavelength by using a spacer film of graded thickness. Rest of the options are properties of normal interference filters.