Radio Waves

What did Heinrich Hertz use to prove the existence of radio waves?

• A prism

• A microscope

• A telescope

• A spark gap and induction coil

What is the typical frequency a radio telescope might be tuned to for observing the radio sky?

• 408 MHz

• 108 MHz

• 2008 MHz

• 1008 MHz

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-5

What is the main advantage of radio astronomy over optical astronomy?

• It is not affected by sunlight, clouds, and rain

• It provides more colorful images

• It can detect gravitational waves

• It is cheaper

What is the name of the radio astronomy instrument on the WIND spacecraft?

• RADIANT

• SPECTRUM

• SONAR

• WAVES

Tags

NGSS.HS-PS4-5

What is the typical wavelength of radio emissions from Jupiter's ionosphere?

• 150 meters

• 50 meters

• 5 meters

• 15 meters

Tags

NGSS.HS-PS4-1

What is the primary characteristic of a quasar?

• It is a massive black hole

• It emits strong radio waves

• It is a type of nebula

• It is a rapidly rotating star

What is the typical arrangement of antennas in the Very Large Array (VLA)?

• A 'Y' pattern

• A circular pattern

• A square grid

• A straight line

Converts the amplified signal to radio waves or captures the radio waves.

• Power Supply

• Oscillator

• Amplifier

• Antenna

Tags

NGSS.HS-PS4-5

adds useful information to the carrier wave.

• Power Supply

• Modulator

• Amplifier

• Antenna

Tags

NGSS.HS-PS4-5

Creates alternating current at the frequency on which the transmitter will transmit. The oscillator usually generates a sine wave, which is referred to as a carrier wave.

• Oscillator

• Antenna

• Amplifier

• Modulator

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-5