Podcast
Questions and Answers
What is the relation between the grating equation and the wavelengths?
What is the relation between the grating equation and the wavelengths?
- n λ = d(tan Θ + tan Φ)
- n λ = d(sin Θ + sin Φ) (correct)
- n λ = d(cos Θ + cos Φ)
- n λ = d(cot Θ + cot Φ)
What is the effect of decreasing the monochromator exit slit width?
What is the effect of decreasing the monochromator exit slit width?
- Increases the bandwidth of radiation and energy reaching the detector
- Decreases the bandwidth of radiation and energy reaching the detector (correct)
- Has no effect on the bandwidth of radiation and energy reaching the detector
- Increases the signal-to-noise ratio
What is the condition for two adjacent light rays to reinforce each other?
What is the condition for two adjacent light rays to reinforce each other?
- They have different intensities
- They have different wavelengths
- They are out of phase
- They are in phase (correct)
What is the effect of increasing the number of grooves in a grating on its resolution?
What is the effect of increasing the number of grooves in a grating on its resolution?
What is the relation between dispersion and resolution?
What is the relation between dispersion and resolution?
What is the approximate height of the valley between two peaks when they are barely resolved?
What is the approximate height of the valley between two peaks when they are barely resolved?
What is the purpose of a monochromator in spectroscopy?
What is the purpose of a monochromator in spectroscopy?
What is the bending of light rays called when passing through a grating?
What is the bending of light rays called when passing through a grating?
What is the equation that relates the path length difference to the wavelength of light in a grating?
What is the equation that relates the path length difference to the wavelength of light in a grating?
What is the purpose of coating a grating with alumina and silica?
What is the purpose of coating a grating with alumina and silica?
What is the property of laser light that makes it coherent?
What is the property of laser light that makes it coherent?
What is the term for the minimum wavelength difference that can be resolved by a spectrometer?
What is the term for the minimum wavelength difference that can be resolved by a spectrometer?
What occurs when a light ray travels from air into water at a 45° angle?
What occurs when a light ray travels from air into water at a 45° angle?
What is an advantage of using optical fibers in communication?
What is an advantage of using optical fibers in communication?
What happens when the angle of incidence is greater than the critical angle in an optical fiber?
What happens when the angle of incidence is greater than the critical angle in an optical fiber?
What is the purpose of using optical fibers in process monitoring?
What is the purpose of using optical fibers in process monitoring?
What is the equation that relates the refractive indices of two media and the angles of incidence and refraction?
What is the equation that relates the refractive indices of two media and the angles of incidence and refraction?
What is the condition for total internal reflection to occur in an optical fiber?
What is the condition for total internal reflection to occur in an optical fiber?
