Human Eye and Vision
Physics ⇒ Light and Optics
Human Eye and Vision starts at 8 and continues till grade 12.
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See sample questions for grade 9
A person can see objects clearly only when they are between 50 cm and 2 m from his eyes. What kind of defect does he have?
A person with normal vision can read a book at 25 cm but cannot see clearly at 1 m. What defect does he have?
Describe the role of the cornea in vision.
Explain the process of image formation in the human eye.
A person can see objects clearly only when they are between 50 cm and 2 m from his eyes. What kind of defect does he have?
A person has a near point of 50 cm. What power of lens (in diopters) is required to correct his vision to normal (assume normal near point is 25 cm)?
A person with normal vision can read a book at 25 cm but cannot see clearly at 1 m. What defect does he have?
A person with normal vision underwater finds it difficult to see clearly. Explain why this happens in terms of the refractive indices of water and the cornea.
The blind spot in the human eye is the region where (1) only rods are present (2) only cones are present (3) no photoreceptor cells are present (4) the lens is attached
The image formed on the retina of the human eye is (1) real and inverted (2) virtual and erect (3) real and erect (4) virtual and inverted
Which lens is used to correct hypermetropia? (1) Concave lens (2) Convex lens (3) Cylindrical lens (4) Plano-concave lens
Which of the following is a function of the aqueous humor? (1) Forms images (2) Maintains eye shape and nourishes cornea (3) Detects color (4) Controls pupil size
Fill in the blank: The __________ is the opening in the center of the iris through which light enters the eye.
The ability of the eye to focus on both near and distant objects is called __________.
The change in the focal length of the eye lens is brought about by the action of __________ muscles.
The defect of vision in which a person cannot see distant objects clearly is called __________.
True or False: Rod cells in the retina help us to see in dim light.
True or False: The ciliary muscles help in changing the focal length of the eye lens.
True or False: The human eye can detect all wavelengths of electromagnetic radiation.
True or False: The human eye can focus objects at different distances by changing the shape of the lens.
