Spectroscopy

______________ is the energy that can travel through space in the form of waves. 

• telescopes
• electromagnetic spectrum
• observatory

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

Which of the following type of electromagnetic radiation has the most energy

• infrared
• ultraviolet
• microwaves
• radiowaves

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-4

Put the visible light colors in order from longest wavelength to shortest wavelength

• Violet, Indigo, Blue, Green, Orange, Yellow, Red
• Red, Yellow, Green, Orange, Violet, Blue, Indigo
• Red, Orange, Yellow, Green, Blue, Indigo, Violet

Tags

NGSS.HS-PS4-1

Which of the following molecules show microwave activity?

• H2

• CO2

• SF6

• CH3Cl

Intensity of microwave spectral lines

• is same

• increases with increase in energy

• increases with decrease in energy

• Goes through maximum

Which of the following molecule shows rotational spectra?

• CO

• CO2

• H2

• N2

The rotational energy of a diatomic molecule in terms of wave number is

• $E_J\ =\ \frac{h^2}{8\pi^2I}J\left(J+1\right)$

• $E_J\ =\ \frac{h}{8\pi^2IC}J\left(J+1\right)$

• $E_J\ =\ \frac{h^2}{8\pi^2IC}J\left(J+1\right)$

• $E_J\ =\frac{h^2}{8\pi^2I}\ J\left(J+2\right)$

The wave number difference between successive rotational levels of a rigid diatomic molecule is

• 2B J

• BJ(J+1)

• 2BJ(J+1)

• 2BJ(J-1)

The various energy level of a rotational spectrum is given by

• 2B,6B,12B,_ _ _

• 2B,4B,6B,8B,….

• 0,2B,6B,12B,_ _ _

• 0,2B,4B,6B,8B,….

The moment of inertia of two isotopic molecules 12CO and *CO are related to the reduced masses according to the formula

• $\frac{I_1}{I_2}=\sqrt{\frac{\mu_1}{\mu_2}}$

• $\frac{I_1}{I_2}=\frac{\mu_1}{\mu_2}$

• $\frac{I_2}{I_1}=\frac{\mu_1}{\mu_2}$

• Non of the above