The best question that could prompt a scientific investigation is: <u>What substances dissolve in ocean water?</u>
This way the person experimenting can use several variables and make observations. Upon making observations, the person can be able to gather as much data as he can in order to answer the original question that he asked.
When light passes from one medium to another, part of it continues on
into the new medium, while the rest of it bounces away from the boundary,
back into the first medium.
The part of the light that continues on into the new medium is <em>transmitted</em>
light. Its forward progress at any point in its journey is <em>transmission</em>.
Its direction usually changes as it crosses the boundary. The bending is <em>
refraction</em>.
The part of the light that bounces away from the boundary and heads back
into the first medium is <em>reflected</em> light. The process of bouncing is <em>reflection</em>.
Answer:
The angle of diffraction are 67.75 deg and 53.57 deg.
Explanation:
Given:
Davisson and Germer experiment with nickel target for electrons bombarding.
Voltages : 
and 
We have to find the angles that is 
and 
.
Concept:
- Davison Germer experiment is based on de Broglie hypothesis where it says matter has both wave and particle nature.
- When electrons get reflected from the surface of a metal target with an atomic spacing of
, they form diffraction patterns. - The positions of diffraction maxima are given by
. - An atomic spacing is
, when the principal maximum corresponds to n=1 - The wavelength is
, and 
.
Solution:
Finding the wavelength at 
.
⇒ 
⇒ 
nm
Plugging the values of wavelength.
⇒ 
⇒ 
⇒ 
degrees.
Now
For for the electrons with energy , 
the wavelength is.
⇒ 
nm
And
⇒ 
degrees.
So,
The angles of diffraction maxima are 67.75 deg and 53.57 deg.
