CPCS 181 Test 1 UPDATED Exam Questions and CORRECT Answers
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Course
CPCS 181
Institution
CPCS 181
CPCS 181 Test 1 UPDATED Exam
Questions and CORRECT Answers
Speed Light Travels - CORRECT ANSWER- - 3 x 10^5 km/s
- In a vacuum is constant
- Speed in transparent materials depends on colour
Photons - CORRECT ANSWER- - Light thought as stream of particles (photons)
- Each carry nrg depending ...
CPCS 181 Test 1 UPDATED Exam
Questions and CORRECT Answers
Speed Light Travels - CORRECT ANSWER- ✔✔- 3 x 10^5 km/s
- In a vacuum is constant
- Speed in transparent materials depends on colour
Photons - CORRECT ANSWER- ✔✔- Light thought as stream of particles (photons)
- Each carry nrg depending on frequency & wavelength
Pulse - CORRECT ANSWER- ✔✔Quick disturbance of short duration
Continuous Wave - CORRECT ANSWER- ✔✔Continuous series of pulses
Types of Waves - CORRECT ANSWER- ✔✔- S Wave
- P Wave
S Wave - CORRECT ANSWER- ✔✔Goes up & down (water)
P Wave - CORRECT ANSWER- ✔✔Moves in straight line (continuous w/ line) (sound
waves)
Wave Equation - CORRECT ANSWER- ✔✔v = λf
- Wavelength: l (m)
- Frequency: f (Hz)
- Wave speed: v (m/s)
Red Wavelength - CORRECT ANSWER- ✔✔- Long wavelength
- Low frequency
- Low nrg
, Blue Wavelength - CORRECT ANSWER- ✔✔- Short wavelength
- High frequency
- High nrg
EM Radiation - CORRECT ANSWER- ✔✔- Not all can penetrate Earth's atmosphere
- Gases in atmosphere absorb EM radiation , where most wavelengths from space don't reach
ground
Wein's Law - CORRECT ANSWER- ✔✔T [K] = 0.0029 [K.m] / λpeak
- Calculate temp. of any blackbody object
Blackbody - CORRECT ANSWER- ✔✔- Object that absorbs all radiation falling on it
- Doesn't reflect light (appears black when cold)
Continuous Spectrum - CORRECT ANSWER- ✔✔Un-interrupted EM radiation curve over
certain range of wavelengths
Absorption Spectrum - CORRECT ANSWER- ✔✔- Light passes through cooler medium
(usually gas) before reaching us
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