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Clouds look white because water droplets...

Clouds look white because water droplets of clouds scatter all colours of light equally. (True/False)

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Say True or False: All the side of a parallelogram are of equal length.

In these question, a statement of assertion followed by a statement of reason is given .Choose the correct answer out of the following choices: Assertion and reason both are correct statements and reason is correct explanation for assertion. Assertion and reason both are correct statements but reason is not correct explanation for assertion. Assertion is correct statement but reason is wrong statement. Assertion is wrong statement but reason is correct statement. Assertion: The clouds in sky generally appear whitish. Reason: Diffraction due to clouds is efficient in equal measure at all wavelengths.

These questions consist two statements each, printed as Assertion and Reason. While answering these questions you are required to choose any one of the following four responses. If both Assertion and Reason are true and Reason is correct explanation of Assertion. If both Assertion and Reason are true but Reason is not correct explanation of Assertion. If Assertion is true but Reason is false. If both Assertion and Reason are false. Assertion:Agrobacterium tumefaciens is popular in genetic engineering because this bacterium is associated with roots of all cereals and pulse crops. Reason: A gene is incorporated in the bacterial chromsomal genome gets automatically transferred to the crop with which the bacterium is associaated.

Direction. In the follwing questions, a statement of assertion is followed by a statement of reason. While answering a question, you are required to choose the correct are out of the given four responses and mark it as (A). If both assertion and reason are true and reason is the correct explanation of the assertion, (B) if both assertion and reason are true but reason is not correct explanation of the assertion. (C) if asssertion is true, but reason if false, (D) if both assertion and reason are false Assertion : the drift velocity of electrons in a conductor is very small, when its two ends are connected to a battery. Reason : It is because, as the electrons accelerated , they get scattered or defleted on suffering collisions against the positive ions in the conductor

True/false If all the sides of quadrilateral are equal, then it is a rhombus.

True or False statements : In a scalar matrix, all the non-diagonal entries are equal.

In these question, a statement of asertion followed by a statement of reason is given .Choose the correct answer out of the following choices: Assertion and reason both are correct statements and reason is correct explanation for assertion. Assertion and reason both are correct statements but reason is not correct explanation for assertion. Assertion is correct statement but reason is wrong statement. Assertion is wrong statement but reason is correct statement. Assertion:Thin films such as soap bubble or a thin layer of ol on water show beautiful colours,when illuminated by white light. Reason:It happens due to the interfernce of light reflected from the upper and lower surface ot the thin film.

Say True or False: All the sides or rhombus are of equal length.

MODERN PUBLICATION-THE HUMAN EYE AND THE COLOURFUL WORLD-EXERCISE
  1. The power of lens used to correct myopia is positive. (True/False)

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  2. The sky appears blue, because.

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  3. Clouds look white because water droplets of clouds scatter all colours...

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  4. Twinkling of stars is due to atmospheric:

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  5. The sun is visible two minutes before sunrise and about two minutes su...

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  6. Planets twinkle on account of atmospheric refraction. (True/False)

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  7. What is the far point and near point of human eye with normal vision?

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  8. Fill ups The ability of the eye lens to adjust its focal length is cal...

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  9. In human eye,image of an object is formed at …… .

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  10. The least distance of distnct vision is ………… .

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  11. Fill ups The defect of the eye due to which distant objects cannot be ...

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  12. Fill ups The defect of the eye due to which nearby objects cannot be s...

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  13. Fill ups A person suffering from myopia and hypermetropia uses……………len...

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  14. Fill ups Old age hypermetropia is called……………. .

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  15. The phenomenon of splitting of white light into its constituent colour...

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  16. Fill ups The wavelength of………………colour of light is maximum and…………….co...

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  17. Name the phenomenon of absorption of light and then re-radiating it in...

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  18. The intensity of light entering the eye is controlled by

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  19. Fill ups Hypermetropia is corrected by ………….lens.

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  20. Fill ups ……………is corrected by convex lens.

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