155754
Which of the following has minimum wavelength ?
1 X-rays
2 Ultraviolet rays
3 $\gamma$-rays
4 Cosmic rays
Explanation:
D Cosmic rays have smallest wavelength $\left(10^{-}\right.$ $\left.{ }^{14} \mathrm{~m}-10^{-12} \mathrm{~m}\right)$ while gamma rays $\left(10^{-12} \mathrm{~m}-10^{-10}\right)$ is second smallest wavelength.
AIPMT- 2002
Electromagnetic Wave
155755
The frequency of $\gamma$-rays, $X$-rays and ultraviolet rays are $a, b$ and $c$ respectively. Then,
1 a $>$ b $>$ c
2 a $ \lt $ b $ \lt $ c
3 $\mathrm{a}=\mathrm{b}=\mathrm{c}$
4 a $>$ c $>$ b
Explanation:
A The wavelength of y-rays is the shortest and the wavelength of ultraviolet rays is the longest, the frequency of y-rays is the highest and the frequency of ultraviolet rays is the lowest. The frequency of $\gamma$-rays, $X$-rays and ultraviolet rays are $\mathrm{a}, \mathrm{b}$ and $\mathrm{c}$ respectively then $\mathrm{a}>\mathrm{b}>\mathrm{c}$.
AIPMT- 2000
Electromagnetic Wave
155756
Ozone layer blocks the radiations of wave length
1 less than $3 \times 10^{-7} \mathrm{~m}$
2 equal to $3 \times 10^{-7} \mathrm{~m}$
3 more than $3 \times 10^{-7} \mathrm{~m}$
4 All of the above
Explanation:
A The ozone layer acts as a barrier to protect the planet from the sun's damaging radiation of high frequency. The ozone layer typically absorbs radiation with a wavelength less than $9 \times 10^{-7}$ or around $3 \times 10^{-1}$ ${ }^{7} \mathrm{~m}$ while ozone layer blocks the radiation of wavelength less than $3 \times 10^{-7} \mathrm{~m}$.
AIPMT- 1999
Electromagnetic Wave
155757
A signal emitted by an antenna from a certain point can be received at another point of the surface in the form of
1 sky wave
2 ground wave
3 sea wave
4 Both (a) and (b)
Explanation:
D Sky wave are electromagnetic waves transmitting antennae emit then receive after being reflected by the ionosphere. This method of propagation is known as Sky wave propagation. It wave travels directly along the earth from one point to another is called ground wave. So, both form can be received at another point of the surface.
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Electromagnetic Wave
155754
Which of the following has minimum wavelength ?
1 X-rays
2 Ultraviolet rays
3 $\gamma$-rays
4 Cosmic rays
Explanation:
D Cosmic rays have smallest wavelength $\left(10^{-}\right.$ $\left.{ }^{14} \mathrm{~m}-10^{-12} \mathrm{~m}\right)$ while gamma rays $\left(10^{-12} \mathrm{~m}-10^{-10}\right)$ is second smallest wavelength.
AIPMT- 2002
Electromagnetic Wave
155755
The frequency of $\gamma$-rays, $X$-rays and ultraviolet rays are $a, b$ and $c$ respectively. Then,
1 a $>$ b $>$ c
2 a $ \lt $ b $ \lt $ c
3 $\mathrm{a}=\mathrm{b}=\mathrm{c}$
4 a $>$ c $>$ b
Explanation:
A The wavelength of y-rays is the shortest and the wavelength of ultraviolet rays is the longest, the frequency of y-rays is the highest and the frequency of ultraviolet rays is the lowest. The frequency of $\gamma$-rays, $X$-rays and ultraviolet rays are $\mathrm{a}, \mathrm{b}$ and $\mathrm{c}$ respectively then $\mathrm{a}>\mathrm{b}>\mathrm{c}$.
AIPMT- 2000
Electromagnetic Wave
155756
Ozone layer blocks the radiations of wave length
1 less than $3 \times 10^{-7} \mathrm{~m}$
2 equal to $3 \times 10^{-7} \mathrm{~m}$
3 more than $3 \times 10^{-7} \mathrm{~m}$
4 All of the above
Explanation:
A The ozone layer acts as a barrier to protect the planet from the sun's damaging radiation of high frequency. The ozone layer typically absorbs radiation with a wavelength less than $9 \times 10^{-7}$ or around $3 \times 10^{-1}$ ${ }^{7} \mathrm{~m}$ while ozone layer blocks the radiation of wavelength less than $3 \times 10^{-7} \mathrm{~m}$.
AIPMT- 1999
Electromagnetic Wave
155757
A signal emitted by an antenna from a certain point can be received at another point of the surface in the form of
1 sky wave
2 ground wave
3 sea wave
4 Both (a) and (b)
Explanation:
D Sky wave are electromagnetic waves transmitting antennae emit then receive after being reflected by the ionosphere. This method of propagation is known as Sky wave propagation. It wave travels directly along the earth from one point to another is called ground wave. So, both form can be received at another point of the surface.
155754
Which of the following has minimum wavelength ?
1 X-rays
2 Ultraviolet rays
3 $\gamma$-rays
4 Cosmic rays
Explanation:
D Cosmic rays have smallest wavelength $\left(10^{-}\right.$ $\left.{ }^{14} \mathrm{~m}-10^{-12} \mathrm{~m}\right)$ while gamma rays $\left(10^{-12} \mathrm{~m}-10^{-10}\right)$ is second smallest wavelength.
AIPMT- 2002
Electromagnetic Wave
155755
The frequency of $\gamma$-rays, $X$-rays and ultraviolet rays are $a, b$ and $c$ respectively. Then,
1 a $>$ b $>$ c
2 a $ \lt $ b $ \lt $ c
3 $\mathrm{a}=\mathrm{b}=\mathrm{c}$
4 a $>$ c $>$ b
Explanation:
A The wavelength of y-rays is the shortest and the wavelength of ultraviolet rays is the longest, the frequency of y-rays is the highest and the frequency of ultraviolet rays is the lowest. The frequency of $\gamma$-rays, $X$-rays and ultraviolet rays are $\mathrm{a}, \mathrm{b}$ and $\mathrm{c}$ respectively then $\mathrm{a}>\mathrm{b}>\mathrm{c}$.
AIPMT- 2000
Electromagnetic Wave
155756
Ozone layer blocks the radiations of wave length
1 less than $3 \times 10^{-7} \mathrm{~m}$
2 equal to $3 \times 10^{-7} \mathrm{~m}$
3 more than $3 \times 10^{-7} \mathrm{~m}$
4 All of the above
Explanation:
A The ozone layer acts as a barrier to protect the planet from the sun's damaging radiation of high frequency. The ozone layer typically absorbs radiation with a wavelength less than $9 \times 10^{-7}$ or around $3 \times 10^{-1}$ ${ }^{7} \mathrm{~m}$ while ozone layer blocks the radiation of wavelength less than $3 \times 10^{-7} \mathrm{~m}$.
AIPMT- 1999
Electromagnetic Wave
155757
A signal emitted by an antenna from a certain point can be received at another point of the surface in the form of
1 sky wave
2 ground wave
3 sea wave
4 Both (a) and (b)
Explanation:
D Sky wave are electromagnetic waves transmitting antennae emit then receive after being reflected by the ionosphere. This method of propagation is known as Sky wave propagation. It wave travels directly along the earth from one point to another is called ground wave. So, both form can be received at another point of the surface.
155754
Which of the following has minimum wavelength ?
1 X-rays
2 Ultraviolet rays
3 $\gamma$-rays
4 Cosmic rays
Explanation:
D Cosmic rays have smallest wavelength $\left(10^{-}\right.$ $\left.{ }^{14} \mathrm{~m}-10^{-12} \mathrm{~m}\right)$ while gamma rays $\left(10^{-12} \mathrm{~m}-10^{-10}\right)$ is second smallest wavelength.
AIPMT- 2002
Electromagnetic Wave
155755
The frequency of $\gamma$-rays, $X$-rays and ultraviolet rays are $a, b$ and $c$ respectively. Then,
1 a $>$ b $>$ c
2 a $ \lt $ b $ \lt $ c
3 $\mathrm{a}=\mathrm{b}=\mathrm{c}$
4 a $>$ c $>$ b
Explanation:
A The wavelength of y-rays is the shortest and the wavelength of ultraviolet rays is the longest, the frequency of y-rays is the highest and the frequency of ultraviolet rays is the lowest. The frequency of $\gamma$-rays, $X$-rays and ultraviolet rays are $\mathrm{a}, \mathrm{b}$ and $\mathrm{c}$ respectively then $\mathrm{a}>\mathrm{b}>\mathrm{c}$.
AIPMT- 2000
Electromagnetic Wave
155756
Ozone layer blocks the radiations of wave length
1 less than $3 \times 10^{-7} \mathrm{~m}$
2 equal to $3 \times 10^{-7} \mathrm{~m}$
3 more than $3 \times 10^{-7} \mathrm{~m}$
4 All of the above
Explanation:
A The ozone layer acts as a barrier to protect the planet from the sun's damaging radiation of high frequency. The ozone layer typically absorbs radiation with a wavelength less than $9 \times 10^{-7}$ or around $3 \times 10^{-1}$ ${ }^{7} \mathrm{~m}$ while ozone layer blocks the radiation of wavelength less than $3 \times 10^{-7} \mathrm{~m}$.
AIPMT- 1999
Electromagnetic Wave
155757
A signal emitted by an antenna from a certain point can be received at another point of the surface in the form of
1 sky wave
2 ground wave
3 sea wave
4 Both (a) and (b)
Explanation:
D Sky wave are electromagnetic waves transmitting antennae emit then receive after being reflected by the ionosphere. This method of propagation is known as Sky wave propagation. It wave travels directly along the earth from one point to another is called ground wave. So, both form can be received at another point of the surface.