155729
The wave length of $X$-rays is in the range.
1 $0.001 \mathrm{~mm}$ to $1 \mathrm{~nm}$
2 $0.001 \dot{\mathrm{A}}$ to $1 \dot{\mathrm{A}}$
3 $0.001 \mu \mathrm{m}$ to $1 \mu \mathrm{m}$
4 $0.001 \mathrm{~cm}$ to $1 \mathrm{~cm}$
Explanation:
A The wave length of X-rays is in the range of $0.001 \mathrm{~mm}$ to $1 \mathrm{~nm}$.
GUJCET 2014
Electromagnetic Wave
155731
Which wavelength of sun is used finally as electric energy ?
1 Radio waves
2 Infrared waves
3 Visible light
4 Micro waves
Explanation:
B Infrared radiations are electromagnetic waves that are invisible to the human eyes. The most powerful natural source of infrared radiation is the sun. It is also known as heat waves, It is used to generate electricity by heating thermocouples.
AIIMS-2007
Electromagnetic Wave
155732
Frequency of infrared wave is approximately.
1 $10^{18} \mathrm{~Hz}$
2 $10^{14} \mathrm{~Hz}$
3 $10^{9} \mathrm{~Hz}$
4 $10^{16} \mathrm{~Hz}$
Explanation:
B Infrared radiation consists of electromagnetic waves, which oscillate with a frequency of $3 \times 10^{11}$ to $4 \times 10^{14} \mathrm{~Hz}$.
AIIMS-1999
Electromagnetic Wave
155733
A laser beam is used for carrying out surgery because it
1 is highly monochromatic
2 is highly coherent
3 is highly directional
4 can be sharply focused
Explanation:
D A laser is a device that, is used to produce a highly monochromatic coherent, a unidirectional beam of light. A laser beam is used for carrying out surgery because surgery needs a sharply focused beam of light for the purpose of precise cutting with no scope of error.
155729
The wave length of $X$-rays is in the range.
1 $0.001 \mathrm{~mm}$ to $1 \mathrm{~nm}$
2 $0.001 \dot{\mathrm{A}}$ to $1 \dot{\mathrm{A}}$
3 $0.001 \mu \mathrm{m}$ to $1 \mu \mathrm{m}$
4 $0.001 \mathrm{~cm}$ to $1 \mathrm{~cm}$
Explanation:
A The wave length of X-rays is in the range of $0.001 \mathrm{~mm}$ to $1 \mathrm{~nm}$.
GUJCET 2014
Electromagnetic Wave
155731
Which wavelength of sun is used finally as electric energy ?
1 Radio waves
2 Infrared waves
3 Visible light
4 Micro waves
Explanation:
B Infrared radiations are electromagnetic waves that are invisible to the human eyes. The most powerful natural source of infrared radiation is the sun. It is also known as heat waves, It is used to generate electricity by heating thermocouples.
AIIMS-2007
Electromagnetic Wave
155732
Frequency of infrared wave is approximately.
1 $10^{18} \mathrm{~Hz}$
2 $10^{14} \mathrm{~Hz}$
3 $10^{9} \mathrm{~Hz}$
4 $10^{16} \mathrm{~Hz}$
Explanation:
B Infrared radiation consists of electromagnetic waves, which oscillate with a frequency of $3 \times 10^{11}$ to $4 \times 10^{14} \mathrm{~Hz}$.
AIIMS-1999
Electromagnetic Wave
155733
A laser beam is used for carrying out surgery because it
1 is highly monochromatic
2 is highly coherent
3 is highly directional
4 can be sharply focused
Explanation:
D A laser is a device that, is used to produce a highly monochromatic coherent, a unidirectional beam of light. A laser beam is used for carrying out surgery because surgery needs a sharply focused beam of light for the purpose of precise cutting with no scope of error.
155729
The wave length of $X$-rays is in the range.
1 $0.001 \mathrm{~mm}$ to $1 \mathrm{~nm}$
2 $0.001 \dot{\mathrm{A}}$ to $1 \dot{\mathrm{A}}$
3 $0.001 \mu \mathrm{m}$ to $1 \mu \mathrm{m}$
4 $0.001 \mathrm{~cm}$ to $1 \mathrm{~cm}$
Explanation:
A The wave length of X-rays is in the range of $0.001 \mathrm{~mm}$ to $1 \mathrm{~nm}$.
GUJCET 2014
Electromagnetic Wave
155731
Which wavelength of sun is used finally as electric energy ?
1 Radio waves
2 Infrared waves
3 Visible light
4 Micro waves
Explanation:
B Infrared radiations are electromagnetic waves that are invisible to the human eyes. The most powerful natural source of infrared radiation is the sun. It is also known as heat waves, It is used to generate electricity by heating thermocouples.
AIIMS-2007
Electromagnetic Wave
155732
Frequency of infrared wave is approximately.
1 $10^{18} \mathrm{~Hz}$
2 $10^{14} \mathrm{~Hz}$
3 $10^{9} \mathrm{~Hz}$
4 $10^{16} \mathrm{~Hz}$
Explanation:
B Infrared radiation consists of electromagnetic waves, which oscillate with a frequency of $3 \times 10^{11}$ to $4 \times 10^{14} \mathrm{~Hz}$.
AIIMS-1999
Electromagnetic Wave
155733
A laser beam is used for carrying out surgery because it
1 is highly monochromatic
2 is highly coherent
3 is highly directional
4 can be sharply focused
Explanation:
D A laser is a device that, is used to produce a highly monochromatic coherent, a unidirectional beam of light. A laser beam is used for carrying out surgery because surgery needs a sharply focused beam of light for the purpose of precise cutting with no scope of error.
155729
The wave length of $X$-rays is in the range.
1 $0.001 \mathrm{~mm}$ to $1 \mathrm{~nm}$
2 $0.001 \dot{\mathrm{A}}$ to $1 \dot{\mathrm{A}}$
3 $0.001 \mu \mathrm{m}$ to $1 \mu \mathrm{m}$
4 $0.001 \mathrm{~cm}$ to $1 \mathrm{~cm}$
Explanation:
A The wave length of X-rays is in the range of $0.001 \mathrm{~mm}$ to $1 \mathrm{~nm}$.
GUJCET 2014
Electromagnetic Wave
155731
Which wavelength of sun is used finally as electric energy ?
1 Radio waves
2 Infrared waves
3 Visible light
4 Micro waves
Explanation:
B Infrared radiations are electromagnetic waves that are invisible to the human eyes. The most powerful natural source of infrared radiation is the sun. It is also known as heat waves, It is used to generate electricity by heating thermocouples.
AIIMS-2007
Electromagnetic Wave
155732
Frequency of infrared wave is approximately.
1 $10^{18} \mathrm{~Hz}$
2 $10^{14} \mathrm{~Hz}$
3 $10^{9} \mathrm{~Hz}$
4 $10^{16} \mathrm{~Hz}$
Explanation:
B Infrared radiation consists of electromagnetic waves, which oscillate with a frequency of $3 \times 10^{11}$ to $4 \times 10^{14} \mathrm{~Hz}$.
AIIMS-1999
Electromagnetic Wave
155733
A laser beam is used for carrying out surgery because it
1 is highly monochromatic
2 is highly coherent
3 is highly directional
4 can be sharply focused
Explanation:
D A laser is a device that, is used to produce a highly monochromatic coherent, a unidirectional beam of light. A laser beam is used for carrying out surgery because surgery needs a sharply focused beam of light for the purpose of precise cutting with no scope of error.
