The human eye forms the image of an object at its:(a) cornea (b) iris (c) pupil (d) retina

Academic Physics NCERT Class 10

(d) retina

Explanation

Retina is a screen at the back part of the eye and behind the eye-lens where the image is formed.

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Updated on: 10-Oct-2022

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Part of the eye which controls the entering of light is called$(a)$. iris $(b)$. cornea$(c)$. lens $(d)$. retina
The size of the pupil of the eye is adjusted by:(a) cornea (b) ciliary muscles (c) optic nerve (d) iris
State the function of iris and pupil in human eye.
The change in focal length of an eye-lens is caused by the action of the:(a) pupil (b) retina (c) ciliary muscles (d) iris
Refraction of light in the eye occurs at:(a) the lens only (b) the cornea only (c) both the cornea and the lens (d) the pupil
(a) Draw a simple diagram of the human eye and label clearly the cornea, iris, pupil, ciliary muscles, eye-lens, retina, optic nerve and blind spot.(b) Describe the working of the human eye with the help of the above diagram.(c) How does the eye adjust itself to deal with light of varying intensity?
Which of the following controls the amount of light entering the eye?(a) ciliary muscles (b) lens (c) iris (d) cornea
Part of the eye which controls the entering of light is called(I)Iris (ii) Cornea (iii) Lens (iv)Retina
To focus the image of a nearby object on the retina of an eye:(a) the distance between eye-lens and retina is increased. (b) the distance between eye-lens and retina is decreased. (c) the thickness of eye-lens is decreased. (d) the thickness of eye-lens is increased.
Give the scientific names of the following parts of the eye:(a) carries signals from an eye to the brain.(b) muscles which change the shape of the eye-lens.(c) a hole in the middle of the iris.(d) a clear window at the front of the eye.(e) changes shape to focus a picture on the retina.
Fill in the following blanks with suitable words:(a) Most of the refraction of light rays entering the eye occurs at the outer surface of the ________.(b) The part of eye sensitive to light is ________.(c) The part of eye which alters the size of the pupil is ________.(d) When light is dim, the pupil becomes ________.(e) The iris controls the amount of ________ entering the eye. (f) The ciliary muscles control the shape of the ________.(g) To bring light from a distant object to a focus on the retina of the eye, the convex eye-lens needs to be made ________.(h) To bring light from a near object to a focus on the retina of the eye, the convex eye-lens need to be made ________.
Voluntary muscles are found in(a)alimentary canal(b)limbs(c)iris of the eye(d)bronchi of lungs
The image distance from the eye lens in the normal eye when we increase the distance of an object from the eye:(A) increases. (B) decreases.(C) remains unchanged. (D) depends on the size of the eyeball.
Where is the image formed in a human eye?
$(a)$. Find out the position of the image of an object situated at A in the plane mirror (Fig. 16.21).$(b)$. Can Paheli at B see this image?$(c)$. Can Boojho at C see this image?$(d)$. When Paheli moves from B to C, where does the image of A move?"

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