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Due to the light sensitive cells in the ...

Due to the light sensitive cells in the eye, we get information about the brightness or dimness of the object and the colour of the object .
True/False

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Select the appropriate option and complete the following paragraph. (cornea, faint, conical, rod, image, coloured, retina, colours, myopic, presbyopic, colour blind) The ____ in our eyes consists of many light sensitive cells. These cells are shaped like a rod and like a cone. The ____ shaped cells give information about the intensity of light to the brain. The ____ cells give information about the colour of the object to the brain. Brain processes all the information received and we see the actual image of the object. Rod shaped cells respond to ___ light also but conical cells do not. Thus we perceive ____ only in bright light. Some people cannot recognize few colours or cannot distinguish between different colours. These persons are said to be _____. Apart from not being able to distinguish between different colours, their eye sight is normal.

What happens to the image distance in the eye when we increase the distance of an object from the eye ?

When an object is placed in front of a concave lens, its image is obtained on the opposite side of the object. True/False

NAVNEET PUBLICATION - MAHARASHTRA BOARD-LENSES-True and False
  1. A concave lens always forms a virtual image. True/False

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  2. A concave lens always forms a virtual image. True/False

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  3. Due to the light sensitive cells in the eye, we get information about ...

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  4. The focal length of a cancave lens is negative. True/False

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  5. The magnification producted by a convex lens is positive or negative d...

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  6. The magnification producted by a convex lens is positive or negative d...

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  7. A concave lens is used as a magnifying glass.

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  8. A convex lens is used as a simple microscope . True/False

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  9. A concave lens is used to correct myopia. True/False

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  10. A convex lens is used to correct hypermetropia. True/False

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  11. When red light falls on the eyes , the cells responbing to red light ...

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  12. When an object is placed in front of a concave lens , its image is obt...

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  13. The image formed by a concave lens is always virtual.

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  14. The principal focurs of a convex lens is virtual.

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  15. An object of height 2 cm forms an image of height 3 cm when placed in ...

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  16. Absence of rod like cells results in colour blindness. True/False

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  17. Nearsightedness can be corrected using spectacles having convex lenses...

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  18. Farsightedness can be corrected using spectacles having lenses of suit...

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  19. As one grows old, ciliary muscles become weak. True/false

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  20. In a simple microscope, the object is placed within the focal length o...

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