Minimum amount of light for low vision, Physics

Assignment Help:

Minimum amount of light for low vision

  • If 90 photons enter the eye ,10 or less are actually absorbed in photoreceptors.
  • About 3% are reflected at the surface of the cornea, and about 50% are absorbed in the various structures(cornea, lens, and humors).
  • Of these that reach the region of the rods ,only about 20% (~10%of the  original no.) are absorbed in the rods.
  • The photons that miss the rods are absorbed in the “backstop”.

Note: Some animals ,such as cuts have a reflective coating behind the rods that give  the rods another opportunity to absorb the photons ,these animals have eyes that “glowing in the dark” if a light shines in them.


Related Discussions:- Minimum amount of light for low vision

How to make a simple pulley, How to make a simple pulley A reasonably s...

How to make a simple pulley A reasonably satisfactory pulley can be complete from a wire clothes hanger and a cotton reel. Cut off both wires of the hanger at a distance of abo

Define magic carpet (moscow phys-tech), Magic Carpet (Moscow Phys-Tech) ...

Magic Carpet (Moscow Phys-Tech) Once sitting in heavy traffic the Baron von Münchausen thinking of a new kind of "magic carpet" type aircraft. The top surface of the large flat

Applications of coupled oscillator concepts, Can you give me few applicatio...

Can you give me few applications of coupled oscillator concepts?

Determine the electric field, Que: Specified the electric potential as ...

Que: Specified the electric potential as a function of the Cartesian coordinates x, y, and z how does one determine the electric field? Ans: If the electric potential i

CRT, can electrons from an electron gun produce electricity

can electrons from an electron gun produce electricity

Composition of simple harmonic motion, eqution of two perpendicular of somp...

eqution of two perpendicular of somple harmonic otion of same period

Illustrate light emitting diode in fibre optic communication, Illustrate th...

Illustrate the light emitting diode for fibre optic communication? Light-Emitting Diode (LED) for fibre optic communication: There are two types of LED. They are surface etc

Physics 1, two forces of 20 units and 30 units act at right angle what is t...

two forces of 20 units and 30 units act at right angle what is the magnitude of resultant force

What is the momentum of box when newtons acts on the box, A box is initiall...

A box is initially at rest on a horizontal, frictionless table. If a force of 10 Newtons acts on the box for 3 seconds, what is the momentum of the box at the end of the 3 second i

Superfluidity, Superfluidity: The phenomena through which, at sufficie...

Superfluidity: The phenomena through which, at sufficiently low temperatures, a fluid can flow along zero viscosity. Its causes are related with superconductivity.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd