P4 Physics

What is the formula of the refractive index of a medium(n)?

• sin(i) x sin(r)

• sin(r)/sin(i)

• sin(i) - sin(r)

• sin(i)/sin(r)

What is the frequency range (Hz) that humans can detect sounds?

• 20 - 100000

• 100 - 100000

• 20 - 20000

• 250 - 45000

Are electromagnetic waves longitudinal or transverse?

• Longitudinal

• Transverse

What determines the pitch of a sound in a sound wave?

Which of the following has the longest wavelength?

• Radio wave

• Infrared

• Visible light

• Gamma ray

How to calculate the speed of a wave?

• wavelength/frequency

• distance/time

• 1/frequency

• frequency x wavelength

What is the value of the prefix "mega"

Which type of cancer is caused by high exposure to ultraviolet rays?

• Lung cancer

• Skin cancer

• Kidney cancer

• Stomach cancer

What happens to the frequency of a wave if the wavelength increases?

• Frequency increases

• Frequency decreases

• Frequency doesn't change

In which medium is the speed of sound highest?

• Liquid

• Solid

• Gas

• Oxygen