Question

1. The frequency of electromagnetic radiation can be determined by knowing what other values? Select all that apply.

• A : temperature

• B : Avogadro number

• C : wavelength (λ)

• D : speed of light (c)

2 . Which of the following are the result of exposing a molecule to IR radiation? Select all that apply.

• A : Stretching

• B : Flipping of nuclear spin

• C : Electron excitation

• D : Rotation

• E : Bending

3. Consider a bond between carbon and generic element Z (C—Z). Changing atom Z from hydrogen (H) to the hydrogen isotope deuterium (D) would result in what change to the wavenumber of absorption of the C—Z bond?

• A : The wavenumber would decrease.

• B : The wavenumber would not change.

• C : It is not possible to determine.  

• D : The wavenumber would increase.

Answer 1

Answer (1) we use the equation to determine frquency f=c/lembda

here f= frequency ; c= speed of light and lembda= wavelength

so frequency is determine by the values wavelength and speed of light

answer is C and D