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

What is the acceleration whereas the bike coasts to a stop, A cyclist rides...

A cyclist rides at a constant speed of 12.0 m/s for 1.20 min and then coasts to a stop with uniform acceleration 21.2 s later. If the total distance travelled is 1321 m, then w

Termofluid, define non flow process

define non flow process

Singularity, singularity: The center of a black hole, where the curvat...

singularity: The center of a black hole, where the curvature of spacetime is maximum. At the singularity, the gravitational tides diverge; no solid object can even theoretical

What is sclera, Sclera: It is an outer most, thick, impermeable to ligh...

Sclera: It is an outer most, thick, impermeable to light. It is more convex and it's front part is transparent is known as Cornea.

Explain core losses or iron losses, Core losses or Iron losses: These loss...

Core losses or Iron losses: These losses having of hysteresis and eddy current losses, which happen due to pulsation of flux in the core. These losses depend upon the maximum flux

What is the magnitude of the current in the circuit, A circuit which employ...

A circuit which employs a DIRECT CURRENT source has a branch which has a capacitor. After the circuit has reached a steady state, what is the magnitude of the current in the c

What is the velocity of the combined system, A 10 kilogram body initially m...

A 10 kilogram body initially moving with a velocity of 10 meters per second makes a head-on collision with a 15 kilogram body initially at rest. The two objects stick together. W

Assuming electrons as classical particals, If electrons are treated as clas...

If electrons are treated as classical particles,which statistics will they follow?

Frequency dependence of dielectric constant, E lectrons have very much smal...

E lectrons have very much smaller mass than that of ions, so they respond more rapidly to a changing electric field. For electric field that oscillates at extremely high frequencie

Newton''s third law of motion, NEWTON'S THIRD LAW OF MOTION: This law c...

NEWTON'S THIRD LAW OF MOTION: This law can be described as "Actions and reactions are equal and opposite". OR To every action there is a

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages