Olbers's paradox makes an incorrect prediction that it gets dark at night because the Universe is:

A) eternal
B) closed.
C) static.
D) flat.


A

Physics & Space Science

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A particle of light is called a ________________

Fill in the blank(s) with correct word

Physics & Space Science

Consider the circuit shown below. Which of the circuit diagrams below that figure correctly represents the circuit shown?


Physics & Space Science

In which of the following processes does the system's rest mass change?

A) An automobile speeds up. B) A rubber ball is squeezed. C) The rest mass changes in both of the above processes. D) The rest mass changes in neither of the above processes.

Physics & Space Science

A two-slit apparatus is covered with a red (660 nm) filter. When white light is shone on the filter, on the screen beyond the two-slit apparatus, there are 9 interference minima within the 4.5 cm-wide central diffraction maximum. When a blue (440 nm) filter replaces the red, how many fringes will there be in the central diffraction maximum?

A. 3 B. 13 C. 9 D. 6

Physics & Space Science