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A virtual cannot be caought on a screen,...

A virtual cannot be caought on a screen, Yet when we see a virtual image, we bring it to the screen i.e., retina of our eye. This happnes because

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The correct Answer is:
image on retina is in the form of electrical neural pulse.
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When would virtual image be produced by convex lens? Why can virtual image be not obtained on a screen?

Answer the following questions: A virtual image cannot be obtained or projected on a screen. Why?

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.

Choose the correct alternative and write it along with its allotted alphabet: A ...... Image cannot be obtained on a screen. A. virtual B. real C. magnified D. inverted

TARGET PUBLICATION-OPTICS-EXERCISE
  1. Which of the following diagrams shows the correct use of prisms in the...

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  2. A point object O is placed in front of a glass rod having spherical en...

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  3. A virtual cannot be caought on a screen, Yet when we see a virtual ima...

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  4. If two power of a thick lense is P(1) and that of a thin lens is P(2)...

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  5. An equiconvex lens is cut into two halves along (i) XOX' and (ii) YOY'...

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  6. The lens shown in the figure drawn below is made of two different mate...

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  7. An object is placed at a distance of (f)/(2) from a convex lens of foc...

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  8. In an optics experiment, with the position of the object fixed, a stud...

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  9. A student measures the focal length of a convex lens by keeping an obj...

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  10. Graph of position of image vs position of point object from a convex l...

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  11. The distance between an object and the screen is 75 cm. When a convex ...

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  12. Convex lens made up of glass (mu(g)=1.5) and radius of curvature R is ...

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  13. A double convex thin lens made of glass (refractive index mu=1.5) has ...

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  14. A convex lens of glass (mu=1.5) has a focal length of 8 cm when placed...

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  15. The power of a thin convex lens (""(a) mu(g)=1.5) is +5.0 D. When it i...

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  16. Figure given below shows a beam of light converging at point P. When a...

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  17. When two thin lenses are kept in contanct, the focal length of the com...

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  18. In the figure an air less of raddi of curvature 10 cm (R1 = R2 = 10 cm...

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  19. The ray diagram could be correct.

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  20. How does the magnification (m) of the real image formed by a lens vary...

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