CHEM0010 - SPECTROSCOPY EXAM QUESTIONS AND
ANSWERS WITH COMPLETE SOLUTIONS VERIFIED
LATEST UPDATE
How is the refractive index calculated?
n=c/v
n is the refractive index.
c is the speed of light.
v is the speed of light in the substance.
What is the speed of light in a vacuum?
3 x 10^8 m/s.
What is the equation for the speed of light?
c = λν
c is speed of light.
λ is wavelength.
v is frequency.
Why is light separated into separate colours when passing through a prism?
Because the wavelength of different colours varies and affects the speed with which it
travels through the prism.
,Remember: c = λν.
What are the molecules in the cone receptors in the eye that detect colours?
Photorhodopsin.
Describe the colours in a colour wheel (clockwise) and their function.
Clockwise: red, orange, yellow, green and blue, violet.
If one colour is absorbed then the colour opposite on the colour wheel will be seen.
What is the function of diffraction grating? Where is it used?
Splits light into component wavelengths.
Used in spectrometers.
What is one Angstrom equal to in metres?
10^-10 m.
What type of EM radiation exists at ~100m wavelength?
Radio waves.
What type of EM radiation exists at ~100pm wavelength?
X-rays.
What type of EM radiation exists at ~10nm wavelength?
Ultraviolet.
What type of EM radiation exists at ~1pm wavelength?
Gamma-rays.
What type of EM radiation exists at ~1cm wavelength?
, Microwaves.
What type of EM radiation exists at ~100µm wavelength?
Infrared.
What type of EM radiation exists at µm wavelength?
Visible light.
What is the sequence of EM waves from longest to shortest wavelength (lowest to
highest frequency).
Longest λ / lowest frequency (v).
Radio waves.
Microwaves
Infrared.
Visible light.
Ultraviolet.
X-rays.
Gamma-rays.
Shortest λ / highest frequency (v).
What is the wavelength of red light?
740nm.
What is the wavelength of violet/blue light?
390nm.
What is a complementary colour?
ANSWERS WITH COMPLETE SOLUTIONS VERIFIED
LATEST UPDATE
How is the refractive index calculated?
n=c/v
n is the refractive index.
c is the speed of light.
v is the speed of light in the substance.
What is the speed of light in a vacuum?
3 x 10^8 m/s.
What is the equation for the speed of light?
c = λν
c is speed of light.
λ is wavelength.
v is frequency.
Why is light separated into separate colours when passing through a prism?
Because the wavelength of different colours varies and affects the speed with which it
travels through the prism.
,Remember: c = λν.
What are the molecules in the cone receptors in the eye that detect colours?
Photorhodopsin.
Describe the colours in a colour wheel (clockwise) and their function.
Clockwise: red, orange, yellow, green and blue, violet.
If one colour is absorbed then the colour opposite on the colour wheel will be seen.
What is the function of diffraction grating? Where is it used?
Splits light into component wavelengths.
Used in spectrometers.
What is one Angstrom equal to in metres?
10^-10 m.
What type of EM radiation exists at ~100m wavelength?
Radio waves.
What type of EM radiation exists at ~100pm wavelength?
X-rays.
What type of EM radiation exists at ~10nm wavelength?
Ultraviolet.
What type of EM radiation exists at ~1pm wavelength?
Gamma-rays.
What type of EM radiation exists at ~1cm wavelength?
, Microwaves.
What type of EM radiation exists at ~100µm wavelength?
Infrared.
What type of EM radiation exists at µm wavelength?
Visible light.
What is the sequence of EM waves from longest to shortest wavelength (lowest to
highest frequency).
Longest λ / lowest frequency (v).
Radio waves.
Microwaves
Infrared.
Visible light.
Ultraviolet.
X-rays.
Gamma-rays.
Shortest λ / highest frequency (v).
What is the wavelength of red light?
740nm.
What is the wavelength of violet/blue light?
390nm.
What is a complementary colour?
