Tagged Questions
0
votes
0answers
19 views
Specular intensity [closed]
Im currently studying for an exam and have been going through some past papers on the subject, however i have come across a question that has recursively come up each year and the notes on it are not ...
0
votes
1answer
28 views
Optical element fitting to Jones matrix
I need help with finding out which optical element is this.
I read about Jones matrix and vectors, but this is not one of the standards.
$$
\begin{pmatrix}
1 & i \\
-i & 1\end{pmatrix}
\cdot ...
0
votes
0answers
17 views
Image formed by a spherical ball [closed]
There is an object on one end of a sphere and an image is formed on the other end. I am given the index of refraction,radius and the distance of the image from the center ball. How do I find the ...
-2
votes
0answers
36 views
Physical Optics [closed]
Monochromatic light is used to illuminate a pair of narrow slits 0.3 mm apart and the interference pattern is observed on a source 0.91 mm away. The second dark band appears 3.0 mm from the center. ...
1
vote
1answer
42 views
Apparent and real depth object in water [closed]
Did I get my formula right? Seems like the correct answer is $d_o = 1.33 \times d_i$ but I thought the formula I should use is $d_i = - \frac{n_2}{n_1} d_o$
-1
votes
0answers
33 views
can you guys help me with image properties. how to do the calculations [closed]
A 10 cm tall perfume bottle is placed 100 cm in front of convex spherical mirror with a radius of curvature of 50 cm.
0
votes
1answer
56 views
Confusing mirror problem
A piece of thin spherical shell that has a radius of curvature of 106 cm is silvered on both sides. The concave side of the piece forms a real image 79.5 cm from the mirror. The piece is then turned ...
-2
votes
0answers
32 views
Determine the image properties by calculation [closed]
A 10 cm tall perfume bottle is placed 100 cm in front of a convex spherical mirror with a radius of curvature of 50 cm. Determine the image properties by calculation
0
votes
0answers
26 views
Problem in geometrical optics [duplicate]
I was trying to solve a problem taken from an Physics Olympiad when I came across a curious and complex mathematical expression. I can not prove with what I know so far about mathematics, does could ...
0
votes
0answers
47 views
Trigonometry in the plane mirror [closed]
I was trying to solve a problem taken from an Physics Olympiad when I came across a curious and complex mathematical expression. I can not prove with what I know so far about mathematics, does could ...
0
votes
0answers
26 views
Direct Normal Insolation
I need a help please.I'm struggling to know how to convert from KWh/m2/day to a flux unit.
For example, if I have a Direct Normal Insolation (DNI) that is equal to 7.41 KWh/m2/day, how can I convert ...
0
votes
0answers
164 views
Why a person with a further near point experience a larger magnification with a magnifier
Two people, Micah and Lyra, with different near points are equally
close to an object. Both inspect the object through the same magnifier
by holding the lens close to the eye. Micah's near ...
1
vote
1answer
70 views
What determines the sign of an image distance?
A lens placed at the origin with its axis pointing along the x axis
produces a real inverted image at $x = - 24 cm$ that is twice as tall as the
object.
What is the image distance?
Why ...
0
votes
2answers
115 views
How to calculate the height and length of a reflected ray?
I barely know anything about optics, so I could use some help about how to go about solving this problem.
If I have a ray of light at a certain height from the optical axis, propagating at an angle, ...
0
votes
0answers
47 views
Resolving power [closed]
In strong light, the pupil of a cat narrows to a vertical slit about 0.5mm across. Can a cat resolve two white mice sitting 5 cm apart a distance of 20m away under these conditions?
And why?
Its to ...
-1
votes
1answer
288 views
Focal length of Convex lens [closed]
A lens forms a real image of $3\ \text{cm}$ high of an object $1\ \text{cm}$ high. If the separation of object and image is $15\ \text{cm}$, find the focal length of the lens.
1
vote
1answer
150 views
Thin lens formulae
Hi I have a question about applying the thin lens formula
$$ \frac{n_1}{s_o} + \frac{n_2}{s_i} = \frac{n_2 - n_1}{R} \,\text{thin lens formula}$$
for a single lens emerged in medium $n_2$ in the ...
1
vote
0answers
214 views
Malus' Law (Polarization) [closed]
Consider the image below:
Let $\theta_2$ be the angle between the axes of transmission of Polarizer 2 and Polarizer 3 and $\theta_3$ be the angle between the axes of transmission of Polarizer 3 ...
2
votes
1answer
375 views
Application of diffraction problem!
Here is a problem that I am working on, which is the applying the concepts of diffraction to the setting of the sun:
Air has a small, usually negligible index of refraction. It is 1.0002926. This ...
0
votes
0answers
127 views
Reflectance and phase shift vs incident angle and wavelength
Plot the refectance and phase shift on reflection $\varphi$ for p and s polarized light versus incident angle $\theta$ for various wavelength $\lambda_1=.., \lambda_2=..,..$ in the simple case of ...
1
vote
0answers
66 views
Photon Statistics of a Coherent Gaussian Beam [closed]
Assume that a 100 pW He-Ne single-mode last emits light at 633 nm in a TEM00 Gaussian beam.
(a)What is the mean number of photons crossing a circle of radius equal to the waist radius of the beam ...
0
votes
0answers
79 views
Reflection in Convex mirrors [closed]
A monkey starts chucking polished stainless bocce balls at you. The bocce balls are 6cm in radius. Where does your image form as a function of bocce balls distance and what is the size of your image ...
2
votes
0answers
86 views
Bandgap Spacing in Photonic Crystals
I am doing some self-study on photonics and have encountered the following question:
We know that amorphous electronic crystals such as amorphous silicon have a bandgap. Can amorphous photonic ...
1
vote
1answer
45 views
Rays in Symmetric Resonator
I'm having some trouble figuring out how to get started on this question:
If I have a symmetric resonator with two concave mirrors of radii $R$ separated by a certain distance, after how many round ...
0
votes
1answer
155 views
Transmission of Gaussian Beam Through Graded-Index Slab
The $ABCD$ matrix of a glass graded-index slab with refractive index $n(y)=n_0(1-\frac{1}{2}\alpha^{2}y^{2})$ and length $d$ is $A=\cos(\alpha d)$, $B=\frac{1}{\alpha}\sin(\alpha d)$, $C=-\alpha ...
0
votes
0answers
61 views
Ultrashort Optical Pulses [closed]
If an ultrashort optical pulse has a complex wavefunction with central frequency corresponding to a certain wavelength and a Gaussian envelope of RMS width of a certain time period, how can I ...
-4
votes
1answer
70 views
Photonics: Slab As a Lens [closed]
The question can be found here: http://gyazo.com/fc4d26cd35e6ce368ad2a8ed504f1dcc
The refractive index it references can be found here: http://gyazo.com/94fd2f3b5ea7da9226c3acd56b0024c1
I'm not ...
4
votes
2answers
828 views
Make a semi transparent mirror with copper
The question:
How would you make a semi transparent mirror (50% reflection, 50% transmission) with glass with a layer of copper. For light $\lambda$ = 500nm Try to be as realistic as possible
What ...
5
votes
2answers
468 views
High school double lens optics question
This is a first year high school homework question (in the Finnish high school), and I'm having serious trouble solving it. I apologize for possible non-standard terms: I'm doing the translation from ...
0
votes
0answers
104 views
If you are told an image is virtual and you know it was made by a single optic (either a lens or a mirror) [closed]
If you are told an image is virtual and you know it was made by a single optic (either a lens or a mirror), which of the following must be true? Choose all that apply.
The image distance is ...
0
votes
1answer
69 views
What is the new distance for resolution of the images? [closed]
The taillights of an automobile are $1.25\:\rm{m}$ apart. Assume the pupil of a person's eye has a diameter of $5\:\rm{mm}$ and the light has an average wavelength of $604\:\rm{mm}$. At night, on a ...
1
vote
1answer
241 views
Number of Images from pair of plain mirrors?
Basically not exactly a homework, but I came across this problem.
I have two plain mirrors angled at 60 degree angle. An object is placed in between symmetrically. What will be the number of total ...
0
votes
1answer
288 views
How do I get the focal length from a camera matrix?
Given the camera matrix, can I find the focal length of this camera ?
3
votes
1answer
309 views
Compound lenses and virtual images
Ok so I have this problem where I have a system of two lenses. All I know is that the distance between the object and the first lens is 30cm, the distance between the object and the final image is ...
2
votes
4answers
269 views
How are we able to view an object in a room with bulb..?
This is a very basic question on optics. How are we able to view an object kept in a room with a bulb?
From what I understand, light rays from bulb will hit the object and some colour will be ...
2
votes
1answer
293 views
How to set up a very simple experiment in optics?
This might come across as a very rudimentary question.
My fundamentals of Optics are weak. In the optics chapter of my physics text book I saw diagrams each depicting an object on the left and a lens ...
0
votes
0answers
51 views
on interference [closed]
A laser is oscillating at two frequencies v1 and v2 such that v2-v1=c/2l where resonator length. If the laser is used in an interference experiment,what is the minimum path difference between ...
2
votes
2answers
860 views
Michelson rotating mirror experiment
Could someone explain the calculation required to answer this question. It is from a text book and the answer is recorded as 585Hz but I cannot replicate the answer.
In 1931 Michelson used a ...
2
votes
2answers
260 views
If you are told an image is real and you know it was made by a single optic (either a lens or a mirror), which of the following must be true?
The image distance is positive.
The image distance is negative.
The image is inverted.
The image is upright.
The image height is positive.
The image height is negative.
The magnification of the image ...
1
vote
0answers
341 views
Double Slit Problem, Waves and Optics [closed]
Given d(slit separation)= $0.158\:\rm{mm}$, $\lambda _{red}= 665\:\rm{nm}$, $\lambda _{g/y}= 565nm$, L(distance from screen)= $2.24\:\rm{m}$
What is the distance between the third order red and ...
2
votes
2answers
227 views
Calculating the deflection of an arbitrary beam of light from a thin lens
Suppose we have a lens with known focal length and are using the thin lens approximation. Is it possible to determine how an arbitrary beam of light will be deflected by it? Or, is it the case that ...
