All categories

3 years ago

The ____ is a line drawn at a right angle to a barrier. a. normal c. node b. ray d. wave front

Physics

1 answer:

Natalija [7]3 years ago

5 0

Answer:

a. normal

Explanation:

In the field of physics the normal is a line drawn at a right angle to a barrier. In other words the normal line is the line that is drawn perpendicular (right angle, 90 degrees) to the reflective surface of a mirror, or the particular boundary in which refraction occurs at the point of incidence of a light ray. This can be seen in the picture attached below.

You might be interested in

What is an object that allows some electrons to go through it

Katen [24]

Answer:

generator?

Explanation:

im not sure about it

6 0

3 years ago

Read 2 more answers

Explain what happens to the sound waves when a singer hits the high pitched notes during the National Anthem. Be sure to use the

Tasya [4]

Answer: The frequency increases as the pitch increases, and the amplitude increases as the volume increases

Explanation:

Waves have the property of:

v = f*λ

where v is the speed of the wave (which is almost constant for soundwaves, v = 340 m/s)

f is the frequency of the wave, and λ is the wavelength.

Now, we know that when the pitch of a note increases, also does the frequency of the soundwave (so the wave oscillates faster).

Now, we also want to include the amplitude of the soundwave in this.

The amplitude is related to the volume of the soundwave (actually is related to the energy, and as higher is the energy, more "loud" is the sound).

As the high pitch part is usually "louder", we can assume that we have an amplitude increase.

Then the answer would be:

"The frequency increases as the pitch increases, and the amplitude increases as the volume increases"

4 0

3 years ago

The spectrum from a hydrogen vapour lamp is measured and four lines in the visible light range are observed. These lines are the

Elan Coil [88]

Answer:

$10942249.24 m^{-1}$

Explanation:

Rydberg's formula is used to describe the wavelengths of the spectral lines of chemical elements similar to hydrogen, that is, with only one electron being affected by the effective nuclear charge. In this formula we can find the rydberg constant, knowing the wavelength emitted in the transcision between two energy states, we can have a value of the constant.

$\frac{1}{\lambda}=Z^2R(\frac{1}{n^2_{1}}-\frac{1}{n^_{2}^2}})$

Where $\lambda$ it is the wavelength of the light emitted, R is the Rydberg constant, Z is the atomic number of the element and $n_{1} n_{2}$ are the states where $n_{1}$ .

In this case we have Z=1 for hydrogen, solving for R:

$R=\frac{1}{\lambda}*(\frac{1}{n^2_{1}}-\frac{1}{n^_{2}^2}})^{-1}\\R=\frac{1}{658.9*10^{-9}m}*(\frac{1}{2^2}-\frac{1}{3^2}})^{-1}\\R=1.52*10^6m^{-1}*(\frac{36}{5})=1.09*10^7 m^{-1}=10942249.24m^{-1}$

This value is quite close to the theoretical value of the constant $R=10967758.34 m^{-1}$

5 0

4 years ago

Oscilaţia are un caracter ... , mişcarea se repetă aproape identic după un ... De timp. B) Dacă amplitudinea oscilaţiei rezultan

LenaWriter [7]

Answer:

sorry im english

Explanation:

5 0

3 years ago

In the future, several students living different types of electromagnetic radiation. Which of the following travels through spac

Gwar [14]

Answer:

Explanation:

As the visible light, infrared and radio waves are all electromagnetic waves with different frequency and wavelength, all of them propagate through the space at the same constant speed which is the speed of light in vacuum, as they meet the following equation:

c = λ*f

7 0

3 years ago