When frequency increases more wave crests pass a fixed point each second. That means the wavelength shortens. So, as frequency increases, wavelength decreases. The opposite is also true—as frequency decreases, wavelength increases.
Answer:
c. More intense IR absorption occur for those bonds having greater dipole moment changes with bond lengthening in a vibration.
Explanation:
When the molecules is exposed to the infrared radiation, the sample molecules absorb the radiation of wavelengths (specific to molecule) which causes change in the dipole moment of the sample molecules. The vibrational energy levels of the sample molecules consequently transfer from the ground state to the excited state.
Frequency of absorption peak is determined by vibrational energy gap.
Intensity of absorption peaks is related to change of dipole moment and possibility of transition of the energy levels.
Thus, by analyzing infrared spectrum,abundant structure information of the molecule can be known.
Hence, the correct answer to the question is
c. More intense IR absorption occur for those bonds having greater dipole moment changes with bond lengthening in a vibration.
Answer:
or 88.3m/s^2
Explanation:
Using suvat where we list everything that we are given
s=49m
u=0m/s
v=93m/s
a=?
t=we are not given this value, so we don't use
using a formula that doesn't involve time:
rearranging to find acceleration by subtracting u^2 on both sides
then dividing 2s on both sides
so the acceleration is 88.3ms^-2 (1dp)
By the same token, any random change in a gene's DNA is likely to result in a protein that does not function normally or may not function at all. Such mutations are likely to be harmful. Harmful mutations may cause genetic disorders or cancer. ... Cancer genes can be inherited
Answer:
b.) dark absorption lines will appear in the spectrum.
The effect of a cool, dilute gas between an observer and a continuous hot source is that dark absorption lines will appear in the spectrum.
Explanation:
Kirchhoff’s laws establish that:
- A solid, liquid or dense incandescent gas emits a continuous spectrum.
- A hot and diffuse gas produces bright spectral lines (emission lines).
- A gas of lower temperature against a source of continuum spectrum, produces dark spectral lines (absorption lines) superposed in the continuum spectrum.
Stars are great scenarios to understand Kirchhoff’s laws. Since the spectrum¹ that is received from them will have different features according with the several configuration described above. Stars are not at homogeneous temperature, that leads to gradients in different layers because to its constant exchange of heat with its surroundings in an attempt to reach the thermodynamic equilibrium.
The continuum observed in the stellar spectra comes from the inner layer of the photosphere (higher temperature), while absorption lines are formed in the outer layer of the photosphere and the stellar atmosphere (lower temperature). More accurately, a photon of the inner layer of the photosphere will be absorbed by an electron of an atom or ion that is in the outer layer, generating an electronic transition², the electron, upon returning to its base state will emit a photon or a series of photons that will not necessarily go in the same direction of the incident photon, creating an absorption line in the stellar spectrum.
It is important to remember that photons are the particles that constitute light.
Keys terms:
¹Spectrum: Decomposition of light in its characteristic colors (wavelengths).
²Electronic transition: When an electron passes from one energy level to another, either for the emission or absorption of a photon.
