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Multiple choice physics electromagnetic waves properties and uses of different radiation electromagnetic spectrum spectrum

Which wavelength of harmful UV-radiations is prevented by ozone layer in entering the Earth atmosphere?

  1. $210-300nm$
  2. $200-310nm$
  3. $120-210nm$
  4. $400-700nm$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The ozone layer primarily absorbs UVC radiation (100-280 nm) and some UVB. The range 120-210 nm falls within the UVC spectrum, which is effectively blocked by the atmosphere.

Multiple choice physics electromagnetic waves properties and uses of different radiation electromagnetic spectrum spectrum

A wave has a wavelength of $0.01A^o$. Name the wave:

  1. X rays

  2. Micro waves

  3. Gamma waves

  4. Radio waves
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Electromagnetic radiation is classified into types according to the frequency of the wave. These types include, in order of increasing frequency, radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays and gamma rays.
The frequency is the inverse of wavelength. Hence, in the order of increasing wavelength, the waves are Gamma rays ($<1nm$), X-rays ($1-{ 10 }nm$), infra red rays ($700-{ 10 }^{ 5 }nm$), micro waves (${ 10 }^{ 5 }-{ 10 }^{ 8 }nm$), radio waves (${ >10 }^{ 8 }nm$).
Therefore, gamma rays has a wavelength of $0.01 \mathring{A}$.

Multiple choice physics electromagnetic waves properties and uses of different radiation electromagnetic spectrum spectrum

Name the high energetic invisible electromagnetic wave which helps in the study of structure of crystals.

  1. $X$-rays

  2. Cathod rays

  3. Gamma rays

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The electromagnetic wave which helps in the study of structure of crystals is X-rays.
If a beam of x rays is passed through a crystal, it makes a pattern on a photographic plate. The pattern is called crystallogram (the arrangement of the atoms each crystal has its own crystallogram). It reveals the crystal`s internal structure. 

Multiple choice physics electromagnetic waves properties and uses of different radiation electromagnetic spectrum spectrum

A wave has wavelength $50A^o$. Name the wave.

  1. X-ray

  2. Gamma ray

  3. Radio waves

  4. Micro waves
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Electromagnetic radiation is classified into types according to the frequency of the wave. These types include, in order of increasing frequency, radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays and gamma rays.
The frequency is the inverse of wavelength. Hence, in the order of increasing wavelength, the waves are Gamma rays ($<1nm$), X-rays ($1-10nm$), infra red rays ($700-{ 10 }^{ 5 }nm$), micro waves (${ 10 }^{ 5 }-{ 10 }^{ 8 }nm$), radio waves (${ >10 }^{ 8 }nm$).
Therefore, X-rays has a wavelength of $50 \mathring{A}$.

Multiple choice physics electromagnetic waves properties and uses of different radiation electromagnetic spectrum spectrum

Which radiation is used for satellite communication?

  1. Micro waves

  2. X rays

  3. Gamma rays

  4. Infra red rays
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Microwaves are a form of electromagnetic radiation with wavelengths ranging from as long as one meter to as short as one millimeter; with frequencies between 300 MHz (0.3 GHz) and 300 GHz. This broad definition includes both UHF and EHF (millimeter waves), and various sources use different boundaries. 
Microwave technology is extensively used for point-to-point telecommunications (i.e. non-broadcast uses). Microwaves are especially suitable for this use since they are more easily focused into narrower beams than radio waves, allowing frequency reuse; their comparatively higher frequencies allow broad bandwidth and high data transmission rates, and antenna sizes are smaller than at lower frequencies because antenna size is inversely proportional to transmitted frequency. Microwaves are used in spacecraft communication, and much of the world's data, TV, and telephone communications are transmitted long distances by microwaves between ground stations and communications satellites.

Multiple choice physics electromagnetic waves properties and uses of different radiation electromagnetic spectrum spectrum

Name the rays or waves of wavelength nearly $0.1nm$.

  1. IR rays

  2. UV rays

  3. Gamma rays

  4. X-rays
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

X-rays is a form of electromagnetic radiation. Most X-rays have a wavelength ranging from $0.01$ to $10$ nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz (${ { 3\times 10 }^{ 16 }\ Hz\ to\ 3\times 10 }^{ 19 }Hz$) and energies in the range 100 eV to 100 keV.
Hence, the rays or waves of $0.1 nm$ is X-rays.

Multiple choice physics electromagnetic waves properties and uses of different radiation electromagnetic spectrum spectrum

Name the radiation which can be detected by a solution of silver chloride. 

  1. X-ray radiation

  2. ultraviolet radiation

  3. infrared radiation

  4. visible radiation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Johann Ritter decided to place silver chloride in the area just beyond the violet end of the spectrum, in a region where no sunlight was visible. To his amazement, he saw that the silver chloride displayed an intense reaction well beyond the violet end of the spectrum, where no visible light could be seen. This showed for the first time that an invisible form of light existed beyond the violet end of the spectrum. This new type of light, which Ritter called Chemical Rays, later became known as ultraviolet light or ultraviolet radiation (the word ultra means beyond).
Hence, the radiation which can be detected by a solution of silver chloride is Ultraviolet radiation.