# Recent content by Volcano

1. ### B Ripple tank dispersion

Thank you. You are right. The relationship between frequency and speed in the book is completely opposite with our current knowledge. And I don't want to get into the maths of it. Because I took quite a break from that mathematics. It's hard to come back. Moreover, there are no people in front...
2. ### B Ripple tank dispersion

First of all, let me say that this book was at high school level and that it was first published in 1959. (https://en.wikipedia.org/wiki/Physical_Science_Study_Committee) The book doesn't talk about the depth of the water. It states that when the frequency increases, the angle of refraction...
3. ### B Ripple tank dispersion

We said that the propagation speed in deep water depends on the wavelength. If we increased the frequency, the wavelength will be shorter. So the speed will also change. This is not wrong, I suppose. It was the water waves mentioned in the book. Anyway, what I'm trying to understand is just the...
4. ### B Ripple tank dispersion

Thank you. No, I won't. Just thought exercise. That pdf file is great. Thanks for that. And yes, I don't need horrible equations. I think, understood it. Just one question. Let's consider a giant vibration tank with a sufficient depth and a constant depth. Even a motor that can vibrate at a...
5. ### B Ripple tank dispersion

Unfortunatly. I don't have a ripple tank. As I understand, shallow waters aren't dispersive. When it comes to deep water, it is dispersive. In deep water, the group velocity is equal to half the phase velocity. In deep water the phase speed increases with the wavelength, and with the period...
6. ### B Ripple tank dispersion

Thanks but can you please simplify a little? That is a little complicated for me.
7. ### B Ripple tank dispersion

Because refraction angle is changed. So the speed also. According to Snell Law.
8. ### B Ripple tank dispersion

Consider water waves refraction in a ripple tank. What happen if we increased the ripple frequency. I mean the refraction angle would change or not? Also, propagation speed will change or not? I had seen a photograph in PSSC Physics. According to that, the refraction angle was reducing if we...
9. ### Concave mirror + Glass block

Definetly. I assumed, that stays the same place and the block as a rectangular prism.
10. ### Concave mirror + Glass block

Ah! I got it. You meant that the separation between the block and mirror should be parallel to both surfaces. Thank you very much. Greatly apreciated.
11. ### Concave mirror + Glass block

Is this? (Sorry, I'm taking your time)
12. ### Concave mirror + Glass block

Slightly big seperation but is it ok?
13. ### Concave mirror + Glass block

Is it correct? I can not draw ray diagrams for the second one (105 cm).
14. ### Concave mirror + Glass block

Homework Statement A glass block of thickness 60 cm and refractive index 4/3 is placed in front of a concave mirror. A light source is then placed on the center of curvature of the concave mirror. Find the position of the final image formed. (Focal length is 30 cm) Homework Equations...
15. ### Ripple tank - strobe frequency

Thank you very very much. Again, thanks for your time. Greatly appreciated.