Cengage Expert Team Solutions for Chapter: Electromagnetic Radiation, Exercise 1: Practice Questions

Match the following:

Select the correct option using the codes;

The frequency of visible light is

Consider the following statements:
$1.$ Radio waves have the highest frequency among all the waves.
$2.$ AM waves travel far due to high frequency and short wavelength.
$3.$ FM can accommodate more stations due to higher bandwidth.

Which of the statements given above is/ are incorrect?

Consider the following statements:
1. Radars are much more effective than Sonars in water to detect enemy submarines.
2. The effectiveness of Sonar decreases in the air because the speed of sound is the least in air and, the returning wave carries a lot of noise with it.
Which of the statements given above is/ are correct?

Why do traffic signals and warning lights take colour in the red portion of the visible spectrum?

Consider the following statements:
1. Near-infrared waves find application in the construction of night vision apparatuses.
2. Gamma rays are produced in high-energy nuclear explosions and supernovas.
Which of the statements given above is/ are correct?

Which of the following waves can be used to study the universe outside the earth's atmosphere?
$1$. Microwaves
$2$. Gamma-rays
$3$. Soundwaves
Select the correct answer using the codes given below:

Consider the following statements:
$1$. Doppler Effect can be observed in sound waves only.
$2$. Redshift phenomena apply to both light and sound waves.
Which of the statements given above is/are correct?