Sort the stars by their temperature from cold to hot
Blue, violet, yellow, red
Principles of specular reflection? CORRECT ANSWER -
Object whose image is formed by a flat mirror is = real
Angle of incidence = angle of reflection
Image by reflection in flat mirror = virtual
The normal = 90 degrees
Blackbody curves of 4 stars at different temperatures, match to B-V colour index? CORRECT
ANSWER -
Star 1: 0.70
Star 2: 1.25
Star 3: 1.70
Star 4: 1.85
,Absolute zero is a term referring to? CORRECT ANSWER -
All of these: the temperature at which subatomic motion is at minimal, -273°C, the temperature at
which an object will radiate least amount of energy
In an atom, absorption is the process where? CORRECT ANSWER -
An electron is boosted to a higher energy orbital
During a record-setting heat wave in 2016 in India, asphalt-paved roads were so hot that they actually
melted people's shoes on contact, getting them stuck to the pavement. Why would this be far less likely
to happen with roads/sidewalks made of concrete slabs instead? CORRECT ANSWER -
Light grey concrete slabs would absorb much less of the incoming light than black asphalt
The accurate explanation and confirmation of how aroura are produced came from? CORRECT
ANSWER -
Russian and American satellites measuring activity around earths space neighbourhood
Which of the following is NOT an advantage that a reflector telescope has over a refractor telescope?
CORRECT ANSWER -
A reflector doesn't have to deal with the twinkling of the stars caused by the turbulence of air on earth,
as a reflector does
Although Alhazen correctly viewed light as bouncing off objects in all outward directions, why did he
include only the central ray as entering the eye? CORRECT ANSWER -
, He did not know the eye could bend other non-central rays
Which of these examples corresponds to Alhazen's description of how we can "see" external objects?
CORRECT ANSWER -
Intromission: light rays bounce off objects, then travel in straight lines to our eyes
Anaxagoras and Empedocles were the first ones to correctly suggest that
Darkness is simply the absence of light
In the diagram below, according to the principle of specular reflection, which angles are equal?
CORRECT ANSWER -
Both B=C and A=D
What was the role of the "transparent medium" in Aristotle's theory of vision? CORRECT
ANSWER -
Colours of objects traveled through the transparent medium to enter our eyes
When it comes to considering building a new telescope on the ground to observe the universe afar,
which of the specific wavelengths observing telescopes below would be most successful?
CORRECT ANSWER -
Visible light and radio waves telescopes
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