The minimum and maximum distance for clear vision for normal eye is-
Important Questions on Light
Choose between the two options to answer the question specified in the brackets for the following.
An example is illustrated below.
Example: Corolla or Calyx (Which is the miter whorl?) Answer: Calyx
Sclerotic layer or choroid layer (Which one forms the iris?)
Which type of defect of vision is rectified by a convex lens?
Both the eye and the camera have convex lenses.
In order to focus, the eye lens expands or contracts while the camera lens moves forward or backward.
The camera lens produces upside down real images while the eye lens produces only upright real images.
A screen in camera is equivalent to the retina in the eyes.
A camera adjusts the amount of light entering in it by adjusting the aperture of the lens. In the eye the cornea controls the amount of light. The correct statements are :
Consider the following vision defects listed in Columns I and II and the corrective measures in Column III. Choose the correct combination.
| P. | Hypermetropia | Near-sightedness | a. | Convex lens | |
| Q. | Myopia | (ii) | Far-sightedness | b. | Concave lens |
Name the following:
The layer of the eyeball that provide nourishment to the eye.
Mention one function of lens of eyeball.
Mention two features of the image formed by a simple camera.
A person can see distant objects distinctly but is unable to see nearby objects in a perfect way. Predict the probable cause and suggest the corrective measure for such problem.
Write the names of the different refractive medium of eyeball in proper sequence.
Statement Myopia can be corrected by using a biconcave lens.
Statement For a biconcave lens, value is positive.
