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If electromagnetic radiation is made up ...

If electromagnetic radiation is made up of quanta, why don't we detect the discrete packets of energy, for example, when we listen to a radio?

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Answer the following question. When we pick up a newspaper, a book, or an article, we come to our task with certain preconceptions and predispositions. We expect to find a specific piece of information or be presented with an argument or an analysis of something, say, the likelihood of recession in the next six months or the reasons why children can't read. We probably know a little about the book or article we are reading even before we start. There was, after all, some reason why we chose to read one piece of writing rather than another. Our expectations and predispositions may, however, blind us to what the article and its author is actually saying. If, for example, we are used to disagreeing with the author, we may see only what we expect to see and not what is actually there. Our expectations and predispositions may, however, blind us because

When we pick up a newspaper, a book, or an article, we come to our task with certain preconceptions and predispositions. We expect to find a specific piece of information or be presented with an argument or an analysis of something, say, the likelihood of recession in the next six months or the reasons why children can't read. We probably know a little about the book or article we are reading even before we start. There was, after all, some reason why we chose to read one piece of writing rather than another. Our expectations and predispositions may, however, blind us to what the article and its author is actually saying. If, for example, we are used to disagreeing with the author, we may see only what we expect to see and not what is actually there. Day after day in our routine pattern of life we expose ourselves to the same newspaper, the same magazine, even books by authors with the same perspectives. In order to reflect on our reading habits and improve our skills we need to break out of this routine, step back and look at what we are doing when we read. According to the author, which one of the following statements is not true?

When we pick up a newspaper, a book, or an article, we come to our task with certain preconceptions and predispositions. We expect to find a specific piece of information or be presented with an argument or an analysis of something, say, the likelihood of recession in the next six months or the reasons why children can't read. We probably know a little about the book or article we are reading even before we start. There was, after all, some reason why we chose to read one piece of writing rather than another. Our expectations and predispositions may, however, blind us to what the article and its author is actually saying. If, for example, we are used to disagreeing with the author, we may see only what we expect to see and not what is actually there. Day after day in our routine pattern of life we expose ourselves to the same newspaper, the same magazine, even books by authors with the same perspectives. In order to reflect on our reading habits and improve our skills we need to break out of this routine, step back and look at what we are doing when we read. One of the ways to improve our reading habits is to

When we pick up a newspaper, a book, or an article, we come to our task with certain preconceptions and predispositions. We expect to find a specific piece of information or be presented with an argument or an analysis of something, say, the likelihood of recession in the next six months or the reasons why children can't read. We probably know a little about the book or article we are reading even before we start. There was, after all, some reason why we chose to read one piece of writing rather than another. Our expectations and predispositions may, however, blind us to what the article and its author is actually saying. If, for example, we are used to disagreeing with the author, we may see only what we expect to see and not what is actually there. Day after day in our routine pattern of life we expose ourselves to the same newspaper, the same magazine, even books by authors with the same perspectives. In order to reflect on our reading habits and improve our skills we need to break out of this routine, step back and look at what we are doing when we read. Which quality does the author here advocate, to be a good reader ?

When we pick up a newspaper, a book, or an article, we come to our task with certain preconceptions and predispositions. We expect to find a specific piece of information or be presented with an argument or an analysis of something, say, the likelihood of recession in the next six months or the reasons why children can't read. We probably know a little about the book or article we are reading even before we start. There was, after all, some reason why we chose to read one piece of writing rather than another. Our expectations and predispositions may, however, blind us to what the article and its author is actually saying. If, for example, we are used to disagreeing with the author, we may see only what we expect to see and not what is actually there. Day after day in our routine pattern of life we expose ourselves to the same newspaper, the same magazine, even books by authors with the same perspectives. In order to reflect on our reading habits and improve our skills we need to break out of this routine, step back and look at what we are doing when we read. Which word in the passage means 'viewpoints'?

When a radio telescope observes a region of space between two stars it detects electromagnetic radiation that has a wavelength of 0.21 m . This radiation was emitted by hydrogen atoms in the gas and dust located in that region. What is the frequency of this radiation ?

We know that the Sun is fundamental source of all energy that we use. Huge amount of energy is being produced in the Sun and this energy is radiated all around in the form of electromagnetic waves of several possible wavelengths. We can treat the Sun as a point source because it radiates energy uniformly in all directions. Intensity of wave at a point is defined as amount of energy passing that point per unit time and per unit area. We know that Earth is at a distance approximately 1.5 xx 10^(11) m from the Sun and assume that intensity of radiation of the Sun reaching Earth's surface is 10^3 W/ m^2 . How much energy is being radiated by the sun in one second ?

Why don't we observe the wave properties of large objects such as a cricket hall or an neroplane ?

PHYSICS GALAXY - ASHISH ARORA-PHOTOELECTRIC EFFECT AND MATTER WAVES-Discussion question
  1. It is found that photosynthesis starts in certain plants when exposed ...

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  2. Photon A has twice the energy of photon B. (a) If the momentum of A ...

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  3. If electromagnetic radiation is made up of quanta, why don't we detect...

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  4. The threshold wavelength of a metal is ( lambda0). Light of wavelength...

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  5. Consider the de Broglie wavelength of an electron and a proton. Which ...

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  6. If an electron has a wavelength, does it also have a colour?

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  7. Human skin is relatively insensitive to visible light, but ultraviolet...

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  8. Do all electrons emitted in the photoelectric effect have the same kin...

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  9. If you shine ultraviolet light on an isolated metal plate, the plate e...

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  10. Is it always true that for two sources of equal intensity, the number ...

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  11. The wave theory of radiation cannot explain………. Existence of threshold...

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  12. The photoelectros emitted by an illuminted surface have a maximum kine...

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  13. The threshold frequencies for photoemission for three metals numbered ...

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  14. Is p= E/c valid for electrons?

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  15. Photon A is from an ultraviolet tanning lamp and photon B is from a te...

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  16. Of the following statement about the photoelectric effect, which are t...

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  17. In an experiment on photoelectric effect, a photon is incident on an e...

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  18. Can we find the mass of a photon by the definition p =mv?

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  19. If the intensity of the light producing a photocurrent is doubled, how...

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  20. Should the energy of a photon be called its kinetic energy or its inte...

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