Posted on April 23, 2022 (Updated on July 9, 2025)
Do mirrors reflect sunlight?
Space & NavigationMirrors can’t create light, only reflect it. Normally, much of the light from an electric light is absorbed by the walls of a room (and a lot is also reflected which is why you can see!). How much sunlight do mirrors reflect? A very complex dielectric mirror can reflect up to 99.999% of the light
Posted on April 23, 2022 (Updated on July 9, 2025)
What is Firebaseauth?
Space & NavigationFirebaseAuth is the gateway to the Firebase authentication API. With it, you can reference Firebase. Auth. FirebaseAuth objects to manage user accounts and credentials. What does FirebaseAuth instance do? public static FirebaseAuth getInstance () Returns an instance of this class corresponding to the default FirebaseApp instance. Note: Firebase Authentication does not currently support Android Direct
Posted on April 23, 2022 (Updated on July 9, 2025)
What does it mean to be in the null space?
Space & NavigationWhat does a null space mean? Like Row Space and Column Space, Null Space is another fundamental space in a matrix, being the set of all vectors which end up as zero when the transformation is applied to them. What does the null space tell you? Video quote: The null space is a set of
Posted on April 23, 2022 (Updated on July 30, 2025)
Is a coma just an optical illusion?
Space & NavigationIs a Coma Just an Optical Illusion? Peering Behind the Curtain of Unconsciousness Coma. The very word conjures up images from movies and TV – someone lying still, seemingly lost in a world we can’t reach. It makes you wonder, doesn’t it? Is it just a trick of the light, a cruel joke where the
Posted on April 23, 2022 (Updated on July 30, 2025)
What are two solid figures?
Space & NavigationBeyond Flatland: Getting to Know Solid Figures We usually think of shapes as flat things – drawings on paper, maybe. But the real world? It’s bursting with shapes that have depth, that you can hold in your hand. These are solid figures, also known as three-dimensional shapes, and they’re way more important than you might
Posted on April 23, 2022 (Updated on July 30, 2025)
How do stars move in the galaxy?
Space & NavigationHow Do Stars Really Move in the Galaxy? It’s More Than Just a Spin! Ever looked up at the night sky and wondered how those twinkling stars are getting around? It’s not as simple as everything just spinning neatly around the galactic center, like a cosmic merry-go-round. The truth is, the movement of stars within