Cosmic ray visual phenomena, or "light flashes" (LF), are spontaneous flashes of light visually perceived by some astronauts outside the magnetosphere of the Earth, such as during the Apollo program. While LF may be the result of actual photons of visible light being sensed by the retina,[1] the LF discussed here could also pertain to phosphenes, which are sensations of light produced by the activation of neurons along the visual pathway.[2]
Astronauts have long reported the experience of seeing flashes while they are in space, even when their eyes are closed. Neil Armstrong and Buzz Aldrin both reported these flashes during the Apollo 11 mission, and similar reports during the Apollo 12 and 13 missions led to subsequent Apollo missions including experiments specifically looking at this strange phenomenon.
Complete question:
A uniform electric field is created by two parallel plates separated by a
distance of 0.04 m. What is the magnitude of the electric field established
between the plates if the potential of the first plate is +40V and the second
one is -40V?
Answer:
The magnitude of the electric field established between the plates is 2,000 V/m
Explanation:
Given;
distance between two parallel plates, d = 0.04 m
potential between first and second plate, = +40V and -40V respectively
The magnitude of the electric field established between the plates is calculated as;
E = ΔV / d
where;
ΔV is change in potential between two parallel plates;
d is the distance between the plates
ΔV = V₁ -V₂
ΔV = 40 - (-40)
ΔV = 40 + 40
ΔV = 80 V
E = ΔV / d
E = 80 / 0.04
E = 2,000 V/m
Therefore, the magnitude of the electric field established between the plates is 2,000 V/m
Answer:
The length of the bond is determined by the number of bonded electrons (the bond order). The higher the bond order, the stronger the pull between the two atoms and the shorter the bond length. Generally, the length of the bond between two atoms is approximately the sum of the covalent radii of the two atoms.
Explanation:
Answer:
c).
Explanation:
As we know that weight of the automobile is given here
so weight = mass times gravity
now from Newton's law
What is the primary source of a sound?
C. A vibration
Which of the following best describes reverberation?
A. The wavefronts become mixed and broken up due to contact with a rough or irregular surface.
_______ occurs when a body’s molecular wavelength sends vibrations to another body, resulting in the production of another sound wave.
D. Resonance
Which of the following is an example of the Doppler effect?
B. Vibrations from a tuning fork pass through the air and cause a nearby dish of water to produce ripples of the same frequency.
In Sir Isaac Newton's time in the early 1700s, what was the general consensus among scientists on the properties of light?
D. Light is composed of particles and travels in a straight line.
If the angle of incidence of a light source to a shiny surface is 30 degrees, what will the angle of reflection be?
C. 30 degrees
If a material has a high index of refraction, it has a
B. high optical density, and light travels more slowly through it.
Which of the following statements regarding the visible spectrum of light is accurate?
D. It has the longest wavelength of all types of waves along the electromagnetic spectrum.
If you were to combine a beam of blue light and a beam of yellow light, what would the result be?
C. Green light
The type of light waves that living things give off naturally is called
D. visible light.
When you're standing in a pool in the summertime, and your leg looks shorter under the water than in air, this is an example of light
B. refraction.