Physics, 23.07.2020 16:01 harris435942

A soap bubble is 115 nm thick and illuminated by white light incident perpendicular to its surface. What wavelength (in nm) and color of visible light is most constructively reflected, assuming the same index of refraction as water (nw = 1.33)?

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Answer from: kasier4600

The wavelength is $\lambda = 612nm$ and the color is Orange

Explanation:

from the question we are told that

The thickness is $D = 115 nm = 115 *10^{-9} \ m$

The refractive index of water is n_w = 1.33

Generally the condition for constrictive interference is

$2 * D = \frac{\lambda _n}{2}$

Where $\lambda _n$ is the wavelength of light in a particular medium

Now considering the medium of water(soap bubble )

The wavelength of light in this medium is mathematically represented as

$\lambda = \frac{\lambda }{n }$

$2 * D = \frac{\frac{\lambda }{n} }{2}$

$2 * D = \frac{\lambda }{2 * n }$

=> $\lambda = 4 *n * D$

substituting values

$\lambda = 4 *1.33 * 115*10^{-9}$

$\lambda = 6.118 *10^{-7} \ m$

$\lambda = 612nm$

The color is orange because the wavelength range of yellow is

590–625 nm

Answer from: Quest

quantum mechanics or quantum physics is physics of very small objects (particles) and physical entities.

quantum physics has some parallels to our macro world and some pretty unique ideas which theoretically and mathematically proven to be true even though we will never be able to access them because of our size.

there are many types of particles: subatomic, elementary etc.

subatomic means they are smaller than atom, elementary means they are at the very basis of everything.

subatomic particles are for eg. protons, neutrons but not electrons.

elementary particles are categorised into 3 groups by what they do.

these 3 groups are quarks, leptons and bosons.

light for example is a particle more precisely a photon a part of leptons.

proton (subatomic particle) is made out of 2 up quarks and 1 down quark each of these has a fractional charge like $\frac{1}{3}$ . (i crazy)

most famous scientist who contributed to this physics are:

max planckalbert einsteinerwin schrödingermany

the topic itself us understand a lot and will probably be vastly used in the future (quantum computers, understanding the big bang,

we also must not forget quantum effects like:

superposition (where 1 thing can be this and that at the same time),entanglement (where two particles are seemingly connected by some sort of unknown (or known) force, energy, matter (i know all that can be the same at least it was at the beginning)

and there is more. but probably too much for this answer to be consistent due to my average understanding of this topic.

hope this you understand quantum mechanics a little more. i'm not an expert in the topic (so don't be like wth if you are an expert) but i'm very interested in it.

anyways quantum physics is a very hard topic (harder than physics (perhaps)) therefore searching for every information there is about it and learning it is unfortunately impossible (you can only specialise into 1 - 3 things or more (perhaps

have fun and i wish you luck!

r3t40

Answer from: Quest

The best answer is (a) which is universal law is in effect at all times. it is constantly at play in everything we do and governs our lives. it is also important to note that universal law applies to not only everything on earth, but everything in the universe as well, which is another reason why it is in effect at all times.

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