Unit 3 Practice - Light & Optics - (Topics 6-8 Quiz)

How many wavelengths are shown in the diagram below?

• 1
• 2
• 3
• 4
• 5

Which one has 𝗹𝗼𝘄𝗲𝗿 𝗳𝗿𝗲𝗾𝘂𝗲𝗻𝗰𝘆?

• infrared radiation
• microwave radiation

What is the wavelength of the wave shown in the diagram below?

• 2 cm
• 4 cm
• 6 cm
• 9 cm
• 17 cm

A wave goes up and down 32 times in 4 s. What is the frequency of the wave, in cycles per second (Hz)?

• 0.125 Hz
• 4 Hz
• 8 Hz
• 32 Hz
• 128 Hz

Which colour has the 𝘀𝗵𝗼𝗿𝘁𝗲𝗿 𝘄𝗮𝘃𝗲𝗹𝗲𝗻𝗴𝘁𝗵?

• Blue
• Yellow

Which colour has the 𝗹𝗼𝗻𝗴𝗲𝗿 𝘄𝗮𝘃𝗲𝗹𝗲𝗻𝗴𝘁𝗵?

• Green
• Yellow

Which colour has 𝗺𝗼𝗿𝗲 𝗲𝗻𝗲𝗿𝗴𝘆?

• Red
• Yellow

Which colour has a 𝗵𝗶𝗴𝗵𝗲𝗿 𝗳𝗿𝗲𝗾𝘂𝗲𝗻𝗰𝘆?

• Red
• Blue

Which radiation does skin sense as warmth?

• infrared radiation
• gamma rays
• visible light
• radio waves
• ultraviolet radiation

Which radiation has the 𝗹𝗼𝗻𝗴𝗲𝘀𝘁 𝘄𝗮𝘃𝗲𝗹𝗲𝗻𝗴𝘁𝗵?

• radio waves
• gamma rays
• visible light
• ultraviolet radiation
• infrared radiation