Radiation

As frequency increases on the electromagnetic spectrum, what happens to the wavelength?

• It stays the same

• It decreases

• It increases

• It doubles

Electromagnetic waves travel around 300,000 kilometers per second. This is known as the speed of ______.

• Rays

• Light

• Sound

• Traveling

Which of the following is not in the electromagnetic spectrum?

• Light waves

• Sound waves

• Radio Waves

• X-rays

Which color has the longest wavelength?

• Yellow

• Red

• Green

• Purple

In which list are forms of electromagnetic energy arranged in order from longest to shortest wavelength?

• Microwave -> Radio wave -> Infrared rays

• Visible light -> x-ray -> radio wave

• Microwave -> infrared -> visibile light

• Infrared -> radio wave -> ultraviolet

Which electromagnetic radiation has the greatest frequency?

• Radio waves

• Visibile light

• Infrared

• X-rays

Based on the Wien's law, when the temperature increases, the phenomena that will be happen is...

• A. There is no change in the wavelength

• B. The wave length will be increase

• C. The wavelength will be decrease

• D.The frequency will be increase

• E. The frequency will be decrease

When the temperature of black body radiation is decrease, the maximum intensity of the radiation will be...

• A. Move to the longer wavelength

• B. Move to the higher frequency

• C. There is no change

• D. First it moves to the shorter wavelength and after that move back to the longer wavelength

• E. Depends on the condition

Two stars A and B emits the same amount of light. The wavelength that star A emits is longer than the wavelength that star B emits. What can you conclude from that explanation?

• A. The frequency of star A is higher than star B

• B. The frequency of star B is higher than star A

• C. The temperature of star A and star B is same

• D. The temperature of star A is higher than star B

• E. The temperature of star A is lower than star B

An iron rod is heated. The colors at different temperatures are noted. Which of the following colors shows that the iron rod is at the lowest temperature?

• red

• orange

• white

• blue