Electromagnetic Spectrum

Electromagnetic waves vary in

• the speed they travel in a vacuum.

• wavelength and frequency.

• the way they reflect.

• the orientation of their electric and magnetic fields.

To calculate the frequency of an electromagnetic wave, you need to know the speed of the wave and its

• wavelength.

• intensity.

• refraction.

• amplitude.

Infrared rays have a shorter wavelength than

• Ultraviolet ray.

• X-rays.

• radar waves.

• gamma rays

The full range of frequencies of electromagnetic radiation is called

• visible light.

• radio waves.

• the electromagnetic spectrum.

• invisible radiation.

The waves with the longest wavelengths in the electromagnetic spectrum are

• Infrared rays.

• radio waves

• gamma rays

• X-rays

The visible light spectrum ranges between

• radar waves and X-rays.

• television waves and infrared rays.

• infrared rays and ultraviolet rays.

• ultraviolet rays and gamma rays.

X-ray photographs show softer tissue

• as invisible.

• as dark, highly exposed areas.

• the same as dense bones.

• as bright white areas.

Which of the following occurs as a light wave bends when it passes from one medium into another?

• constructive interference

• refraction

• destructive interference

• reflection

Newton’s prism experiments showed that white sunlight is made up of

• the full electromagnetic spectrum.

• only blue light.

• all the colors of the visible spectrum.

• only the longest wavelengths.

True or false: as you move along the spectrum, radio to gamma waves, the wavelengths decrease in size (get smaller)

• true
• false