Question

8) The quantity of 1.5x 10" Hz can be also expressed as:
a) 1.5 MHz
b) 1.5 GHz
c) 150 GHz
d) 15.0 GHz​

Answer 1

Answer:

By the end of this section, you will be able to:

List three “rules of thumb” that apply to the different frequencies along the electromagnetic spectrum.

Explain why the higher the frequency, the shorter the wavelength of an electromagnetic wave.

Draw a simplified electromagnetic spectrum, indicating the relative positions, frequencies, and spacing of the different types of radiation bands.

List and explain the different methods by which electromagnetic waves are produced across the spectrum.

In this module we examine how electromagnetic waves are classified into categories such as radio, infrared, ultraviolet, and so on, so that we can understand some of their similarities as well as some of their differences. We will also find that there are many connections with previously discussed topics, such as wavelength and resonance. A brief overview of the production and utilization of electromagnetic waves is found in Table 1.

Table 1. Electromagnetic Waves

Type of EM wave Production Applications Life sciences aspect Issues

Radio & TV Accelerating charges Communications remote controls MRI Requires controls for band use

Microwaves Accelerating charges & thermal agitation Communications, ovens, radar Deep heating Cell phone use

Infrared Thermal agitations & electronic transitions Thermal imaging, heating Absorbed by atmosphere Greenhouse effect

Visible light Thermal agitations & electronic transitions All pervasive Photosynthesis, Human vision

Ultraviolet Thermal agitations & electronic transitions Sterilization, Cancer control Vitamin D production Ozone depletion, Cancer causing

X-rays Inner electronic transitions and fast collisions Medical Security Medical diagnosis, Cancer therapy Cancer causing

Gamma rays Nuclear decay Nuclear medicine, Security Medical

Answer 2

Answer:

The correct answer will be -

(C) 150 GHz

Explanation:

We know that -

• We can write 10³ Hz as 1 kHz
• Also 10⁶ Hz as 1 MHz
• Also 10⁹ Hz as 1 GHz

Given in the question The quantity is 1.5 x 10¹¹ Hz we have to express it to check from the options which one is correct.

We can separate 100 from the above quantity and write it as -

$1.5 \times 100\times 10^9 \ Hz\\\\150\times 10^9 \ Hz$

And we know that we can write  10⁹ Hz as 1 GHz.

So it will be 150 GHz

#SPJ6