QBManager

Dual nature of radiation and Matter

142593 The electromagnetic radiations are in descending order of wavelengths in following sequence:

1 Infrared waves, radio waves,

x

-rays, visible light rays

2 Radio waves, infrared waves, visible light rays,

x

-rays

3 Radio waves, visible light rays, infrared waves,

x

-rays

4

x

-rays, visible light rays, infrared waves, radio waves

Explanation:

B | Wave have | | Wavelength |
| :--- | :--- | :--- |
| Infrared waves | $\to$ | $780 nm$ to $1 nm$ |
| Radio waves | $\to$ | $1 mm$ to $100 km$ |
| X-rays waves | $\to$ | 0.03 to $3 nm$ |
| Visible light rays | $\to$ | $400 nm$ to $700 nm$ |

Shift-II

Dual nature of radiation and Matter

142595 Pick out the longest wavelength from the following types of radiations.

1 visible blue light

2 Ultraviolet light

3 X-rays

4 Visible red light

Explanation:

D | Wave have| | Wavelength |
| :--- | :--- | :--- |
| Visible blue light | $\to$ | $450 - 495 nm$ |
| Ultraviolet light | $\to$ | $100 - 400 nm$ |
| X-rays | $\to$ | $0.03 - 3 nm$ |
| Visible red light | $\to$ | $620 - 750 nm$ |
Hence, from the above visible red light has the longest wavelength.

AP EAMCET (21.09.2020) Shift-II

Dual nature of radiation and Matter

142597 Consider the following statements about visible light, $U V$ light and $X$ -rays:
$1.The wave length of visible light is more than that of X) = - r a y s$
$2.The energy of X-ray photons is higher than that of UV light photons$
$3.The energy of UV light photons is less than that of visible light photons$
Which of the statements given above is/are correct?

1 1,2 and 3

2 1 and 2 only

3 2 and 3 only

4 1 only

Explanation:

B $X$ - rays $\to 10^{- 13} m$ to $10^{- 8} m$
Visible light $\to 400 \times 10^{- 9} m$ to $700 \times 10^{- 9} m$
UV light $\to 10^{- 8} m$ to $400 \times 10^{- 9} m$
As we know longer wavelength has less energy while shorter wavelength has high energy.
wavelength of visible light is more than the $X$ -rays
Energy of X-ray photon is higher than that of UV light because wavelength of X-rays is shorter than UV light is more than that of visible light.

NDA (II) 2018

Dual nature of radiation and Matter

142598 $20 kV$ potential is applied across $X$ -ray tube, the minimum wavelength of $X$ -ray emitted will be

1

0.62 \AA

2

0.37 \AA

3

1.62 \AA

4

1.31 \AA

Explanation:

A Given, $V = 20 kV = 20 \times 10^{3} kV$
We know,
${\begin{cases} λ_{min} = \frac{h c}{eV} \\ λ_{min} = \frac{6.6 \times 10^{- 34} \times 3 \times 10^{8}}{1.6 \times 10^{- 19} \times 20 \times 10^{3}} \\ λ_{min} = 0.61875 \times 10^{- 10} m \\ λ_{min} = 0.62 \AA \end{cases}$

JIPMER-2004

Dual nature of radiation and Matter

142593 The electromagnetic radiations are in descending order of wavelengths in following sequence:

1 Infrared waves, radio waves,

x

-rays, visible light rays

2 Radio waves, infrared waves, visible light rays,

x

-rays

3 Radio waves, visible light rays, infrared waves,

x

-rays

4

x

-rays, visible light rays, infrared waves, radio waves

Explanation:

B | Wave have | | Wavelength |
| :--- | :--- | :--- |
| Infrared waves | $\to$ | $780 nm$ to $1 nm$ |
| Radio waves | $\to$ | $1 mm$ to $100 km$ |
| X-rays waves | $\to$ | 0.03 to $3 nm$ |
| Visible light rays | $\to$ | $400 nm$ to $700 nm$ |

Shift-II

Dual nature of radiation and Matter

142595 Pick out the longest wavelength from the following types of radiations.

1 visible blue light

2 Ultraviolet light

3 X-rays

4 Visible red light

Explanation:

D | Wave have| | Wavelength |
| :--- | :--- | :--- |
| Visible blue light | $\to$ | $450 - 495 nm$ |
| Ultraviolet light | $\to$ | $100 - 400 nm$ |
| X-rays | $\to$ | $0.03 - 3 nm$ |
| Visible red light | $\to$ | $620 - 750 nm$ |
Hence, from the above visible red light has the longest wavelength.

AP EAMCET (21.09.2020) Shift-II

Dual nature of radiation and Matter

142597 Consider the following statements about visible light, $U V$ light and $X$ -rays:
$1.The wave length of visible light is more than that of X) = - r a y s$
$2.The energy of X-ray photons is higher than that of UV light photons$
$3.The energy of UV light photons is less than that of visible light photons$
Which of the statements given above is/are correct?

1 1,2 and 3

2 1 and 2 only

3 2 and 3 only

4 1 only

Explanation:

B $X$ - rays $\to 10^{- 13} m$ to $10^{- 8} m$
Visible light $\to 400 \times 10^{- 9} m$ to $700 \times 10^{- 9} m$
UV light $\to 10^{- 8} m$ to $400 \times 10^{- 9} m$
As we know longer wavelength has less energy while shorter wavelength has high energy.
wavelength of visible light is more than the $X$ -rays
Energy of X-ray photon is higher than that of UV light because wavelength of X-rays is shorter than UV light is more than that of visible light.

NDA (II) 2018

Dual nature of radiation and Matter

142598 $20 kV$ potential is applied across $X$ -ray tube, the minimum wavelength of $X$ -ray emitted will be

1

0.62 \AA

2

0.37 \AA

3

1.62 \AA

4

1.31 \AA

Explanation:

A Given, $V = 20 kV = 20 \times 10^{3} kV$
We know,
${\begin{cases} λ_{min} = \frac{h c}{eV} \\ λ_{min} = \frac{6.6 \times 10^{- 34} \times 3 \times 10^{8}}{1.6 \times 10^{- 19} \times 20 \times 10^{3}} \\ λ_{min} = 0.61875 \times 10^{- 10} m \\ λ_{min} = 0.62 \AA \end{cases}$

JIPMER-2004

Dual nature of radiation and Matter

142593 The electromagnetic radiations are in descending order of wavelengths in following sequence:

1 Infrared waves, radio waves,

x

-rays, visible light rays

2 Radio waves, infrared waves, visible light rays,

x

-rays

3 Radio waves, visible light rays, infrared waves,

x

-rays

4

x

-rays, visible light rays, infrared waves, radio waves

Explanation:

B | Wave have | | Wavelength |
| :--- | :--- | :--- |
| Infrared waves | $\to$ | $780 nm$ to $1 nm$ |
| Radio waves | $\to$ | $1 mm$ to $100 km$ |
| X-rays waves | $\to$ | 0.03 to $3 nm$ |
| Visible light rays | $\to$ | $400 nm$ to $700 nm$ |

Shift-II

Dual nature of radiation and Matter

142595 Pick out the longest wavelength from the following types of radiations.

1 visible blue light

2 Ultraviolet light

3 X-rays

4 Visible red light

Explanation:

D | Wave have| | Wavelength |
| :--- | :--- | :--- |
| Visible blue light | $\to$ | $450 - 495 nm$ |
| Ultraviolet light | $\to$ | $100 - 400 nm$ |
| X-rays | $\to$ | $0.03 - 3 nm$ |
| Visible red light | $\to$ | $620 - 750 nm$ |
Hence, from the above visible red light has the longest wavelength.

AP EAMCET (21.09.2020) Shift-II

Dual nature of radiation and Matter

142597 Consider the following statements about visible light, $U V$ light and $X$ -rays:
$1.The wave length of visible light is more than that of X) = - r a y s$
$2.The energy of X-ray photons is higher than that of UV light photons$
$3.The energy of UV light photons is less than that of visible light photons$
Which of the statements given above is/are correct?

1 1,2 and 3

2 1 and 2 only

3 2 and 3 only

4 1 only

Explanation:

B $X$ - rays $\to 10^{- 13} m$ to $10^{- 8} m$
Visible light $\to 400 \times 10^{- 9} m$ to $700 \times 10^{- 9} m$
UV light $\to 10^{- 8} m$ to $400 \times 10^{- 9} m$
As we know longer wavelength has less energy while shorter wavelength has high energy.
wavelength of visible light is more than the $X$ -rays
Energy of X-ray photon is higher than that of UV light because wavelength of X-rays is shorter than UV light is more than that of visible light.

NDA (II) 2018

Dual nature of radiation and Matter

142598 $20 kV$ potential is applied across $X$ -ray tube, the minimum wavelength of $X$ -ray emitted will be

1

0.62 \AA

2

0.37 \AA

3

1.62 \AA

4

1.31 \AA

Explanation:

A Given, $V = 20 kV = 20 \times 10^{3} kV$
We know,
${\begin{cases} λ_{min} = \frac{h c}{eV} \\ λ_{min} = \frac{6.6 \times 10^{- 34} \times 3 \times 10^{8}}{1.6 \times 10^{- 19} \times 20 \times 10^{3}} \\ λ_{min} = 0.61875 \times 10^{- 10} m \\ λ_{min} = 0.62 \AA \end{cases}$

JIPMER-2004

Dual nature of radiation and Matter

142593 The electromagnetic radiations are in descending order of wavelengths in following sequence:

1 Infrared waves, radio waves,

x

-rays, visible light rays

2 Radio waves, infrared waves, visible light rays,

x

-rays

3 Radio waves, visible light rays, infrared waves,

x

-rays

4

x

-rays, visible light rays, infrared waves, radio waves

Explanation:

B | Wave have | | Wavelength |
| :--- | :--- | :--- |
| Infrared waves | $\to$ | $780 nm$ to $1 nm$ |
| Radio waves | $\to$ | $1 mm$ to $100 km$ |
| X-rays waves | $\to$ | 0.03 to $3 nm$ |
| Visible light rays | $\to$ | $400 nm$ to $700 nm$ |

Shift-II

Dual nature of radiation and Matter

142595 Pick out the longest wavelength from the following types of radiations.

1 visible blue light

2 Ultraviolet light

3 X-rays

4 Visible red light

Explanation:

D | Wave have| | Wavelength |
| :--- | :--- | :--- |
| Visible blue light | $\to$ | $450 - 495 nm$ |
| Ultraviolet light | $\to$ | $100 - 400 nm$ |
| X-rays | $\to$ | $0.03 - 3 nm$ |
| Visible red light | $\to$ | $620 - 750 nm$ |
Hence, from the above visible red light has the longest wavelength.

AP EAMCET (21.09.2020) Shift-II

Dual nature of radiation and Matter

142597 Consider the following statements about visible light, $U V$ light and $X$ -rays:
$1.The wave length of visible light is more than that of X) = - r a y s$
$2.The energy of X-ray photons is higher than that of UV light photons$
$3.The energy of UV light photons is less than that of visible light photons$
Which of the statements given above is/are correct?

1 1,2 and 3

2 1 and 2 only

3 2 and 3 only

4 1 only

Explanation:

B $X$ - rays $\to 10^{- 13} m$ to $10^{- 8} m$
Visible light $\to 400 \times 10^{- 9} m$ to $700 \times 10^{- 9} m$
UV light $\to 10^{- 8} m$ to $400 \times 10^{- 9} m$
As we know longer wavelength has less energy while shorter wavelength has high energy.
wavelength of visible light is more than the $X$ -rays
Energy of X-ray photon is higher than that of UV light because wavelength of X-rays is shorter than UV light is more than that of visible light.

NDA (II) 2018

Dual nature of radiation and Matter

142598 $20 kV$ potential is applied across $X$ -ray tube, the minimum wavelength of $X$ -ray emitted will be

1

0.62 \AA

2

0.37 \AA

3

1.62 \AA

4

1.31 \AA

Explanation:

A Given, $V = 20 kV = 20 \times 10^{3} kV$
We know,
${\begin{cases} λ_{min} = \frac{h c}{eV} \\ λ_{min} = \frac{6.6 \times 10^{- 34} \times 3 \times 10^{8}}{1.6 \times 10^{- 19} \times 20 \times 10^{3}} \\ λ_{min} = 0.61875 \times 10^{- 10} m \\ λ_{min} = 0.62 \AA \end{cases}$

JIPMER-2004

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