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 10
A person can see objects clearly only when they are between 50 cm and 200 cm from his eye. What kind of defect of vision does he have?
A person is unable to distinguish between red and green colors. What is this defect called?
Describe how spectacles help correct vision defects.
Explain the term 'blind spot' in the human eye.
Explain why a person with hypermetropia cannot see nearby objects clearly.
A person can see objects clearly only when they are between 50 cm and 200 cm from his eye. What kind of defect of vision does he have?
A person with a near point of 50 cm is advised to use spectacles. What is the power of the lens required to see clearly at 25 cm?
A person with myopia has a far point of 2 m. What is the power of the lens required to correct his vision?
The image formed on the retina of the human eye is: (1) Virtual and erect (2) Real and inverted (3) Real and erect (4) Virtual and inverted
The power of accommodation of the normal human eye is about (1) 2 D (2) 4 D (3) 6 D (4) 8 D
What is the approximate value of the least distance of distinct vision for a normal human eye? (1) 10 cm (2) 25 cm (3) 50 cm (4) 100 cm
Which cells in the retina are responsible for color vision? (1) Rods (2) Cones (3) Both rods and cones (4) Ciliary cells
The ability of the eye to focus on both near and distant objects is called __________.
The defect of vision in which parallel rays of light from distant objects are focused in front of the retina is called __________.
The eye defect caused by the loss of transparency of the lens is called __________.
The minimum distance at which the eye can see objects clearly without strain is called the __________ distance.
True or False: Rod cells in the retina are more sensitive to dim light than cone cells.
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 focal length of its lens.
