The far point of a healthy person is
A ray of light travelling in air fall obliquely on the surface of a calm pond. It will-
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The human eye forms the image of an object at its
The far point of a myopic person is 80cm in front of the eye. Which type of lens is required to correct the problem?
What Colour we obtain on mixing red green blue ?
The refractive indices of three media P, Q, R, are 1.73, 1.33 and 2.24 respectively. Arrange these media in increasing order of their optical density.
The inability among the elderly to see nearby objects clearly because of the weaking of the ciliary muscles is called-
Light waves are
The muscles of the iris control the
At what rate the event should be projected to have the clear image ?
What is the least distance for clear vision in old age ?
The phenomena of light responsible for the working of the human eye is
The angle through which a ray of light turns on passing through a prism is called-
When do we say a person is colour blind ?
If an eye has near point at a distance of 0.5m, What is the power of lens required to correct it ?
The cause of Astigmatism is
The deviation in the path of ray of light can be produced-
When a light passes through a prism, it splits into its component colours. This phenomenon is called.
What is the observed colour of sky as seen from the moon surface ?
What is spectrum-
When a person is suffering from both myopia and hypermetropia, what type corrective lens are required-
Important defect of vision are-
If the person uses spectacles of power + 1.0 Dioptre, Near point = 75 cm .What is the nearest distance of distinct vision for him ?
Ability of the eye lens to adjust its focal length is called
The approximate focal length of the eye lens when the ciliary muscles are fully relaxed