MISA Waves and Electromagnetic Radiation 3

Question 1

What is diffraction?

Accepted Answer

The spreading of waves as they pass through an opening or around an obstacle

Answer

Diffraction is the bending and spreading of waves when they encounter an opening or obstacle, and it is most pronounced when the opening is comparable in size to the wavelength.

Question 2

The Doppler effect describes:

Accepted Answer

The apparent change in frequency of a wave due to relative motion between the source and observer

Answer

The Doppler effect is the perceived shift in frequency (and therefore pitch or color) of a wave when the source and observer are moving relative to each other.

Question 3

What is the period of a wave?

Accepted Answer

The time required to complete one full wave cycle

Answer

The period (T) is the time it takes for one complete wave cycle to pass a given point; it is the reciprocal of frequency (T = 1/f).

Question 4

Which type of electromagnetic radiation is used in medical imaging to view bones inside the body?

Accepted Answer

X-rays

Answer

X-rays have enough energy to penetrate soft tissue but are absorbed by denser bone, making them ideal for diagnostic medical imaging.

Question 5

A wave has a frequency of 200 Hz and a speed of 400 m/s. What is its wavelength?

Accepted Answer

2 m

Answer

Using the wave equation λ = v/f, the wavelength equals 400 m/s ÷ 200 Hz = 2 m.

MISA - Maryland Integrated Science Assessment Practice Test

MISA - Maryland Integrated Science Assessment Practice Test

MISA Waves and Electromagnetic Radiation 3