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Answers
Explanation:
1. an image is formed on the retina with light rays covering most at the cornea and upon entering and exiting the lens . rays from the top and bottom of the object are traced and produce an inverted real image on the retina
Answer:
1.retina
Light enters the eye through the transparent cornea, passes through the aqueous humor, the lens, and the vitreous humor, where it finally forms an image on the retina.
2.The eye is not shaped like a perfect sphere, rather it is a fused two-piece unit, composed of an anterior (front) segment and the posterior (back) segment. The anterior segment is made up of the cornea, iris and lens.
3.Together with the pupil, the iris is responsible for regulating the amount of light that gets into the eye. ... The muscular iris moves to shrink the pupil if there is too much light and widen it if there is not enough. This is an involuntary function, controlled by the brain.
4. idk abt this sorry dude..
5.the angle which an incident line or ray makes with a perpendicular to the surface at the point of incidence.
6.The three laws of reflection are
1. The angle between the incident ray and the normal is equal to the angle between the reflected ray and the normal
2. The incident ray, the normal and the reflected ray are all in the same plane
3. Incident ray and refracted ray are on different sides of the normal
Law 1 explained
The angle between the incident ray and the normal is equal to the angle between the reflected ray and the normal.
Diagram of incident ray normal line and reflected ray on a mirror
This means that
θ
i
equals
θ
r
where
θ
i
=
angle of incidence
θ
r
=
angle of reflection
As the angle of incidence (
θ
i
) increases, the angle of reflection (
θ
r
) also increases and they are always equal to each other.
Ray diagram showing refracted ray as angle of incidence increases
Ray diagram showing refracted ray as angle of incidence decreases
Law 2 explained
The incident ray, the normal and the reflected ray are all in the same plane.
Plane of incident ray, normal line and refracted ray
θ
i
=
θ
r
Changing the direction of the incident ray changes the angle of the plane.
Plane of incident ray, normal line and refracted ray changed
θ
i
=
θ
r
Again the incident ray, the normal line and the reflected ray all lie in the same plane.
Law 3 explained
The incident ray and the reflected ray are on different sides of the normal.
The incident ray and refracted ray must be on opposite sides of the normal line.
The above diagram is wrong. The incident ray and the reflected ray can not be on the same side of the normal.
Incident ray and refracted ray on opposite sides of the normal line
The incident ray and reflected ray must be on different sides of the normal.
7.Answer. whenever a ray of light i.e. the incident will hit a point at plane mirror i.e. the normal then the ray of light will get reflected back in the same way i.e. the reflected ray. ... hence it is proved that the angle of incidence = angle of reflection.
8.it controls the amount of light that enters the eye. Lens: Behind the pupil, there is a transparent structure called a lens. By the action of ciliary muscles, it changes its shape to focus light on the retina. It becomes thinner to focus distant objects and becomes thicker to focus nearby objects.
9.What are the different types of blindness? There are three main types of blindness. Color blindness is the inability to perceive differences in various shades of colors, particularly green and red, that others can distinguish. It is most often inherited (genetic) and affects about 8% of males and under 1% of women.
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