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3 years ago

What best describes what happens to sunlight after it passes through the keyhole of the door? (Choose 1)

Physics

1 answer:

zloy xaker [14]3 years ago

8 0

Answer:

It spreads out into multiple shadow regions

Explanation:

when the waves meet the barrier than light is diffracted as When this occurs, the wave bends around the corners of the barrier or passes through the opening of the wedge, which acts as a barrier, forming several patterns with the hole shape of the wedge.
and The main condition for this phenomenon to occur is that the magnitude of the barrier must be equal to the magnitude of the wavelength.
when sunlight as an electromagnetic waves is passes by key hole of gate, then this light will break and form many keyhole-shaped shadow fields.

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Answer:

The velocity ( $v$ ) of the wave is 3.08 $ms^{-1}$ .

Explanation:

According to the figure, the distance ( $\large{L}$ ) between a trough and its adjacent crest is $\large{L = 3 m}$ . Also the wavelength ( $\large{\lambda}$ ) of the wave is $\large{\lambda = 2L}$ . Pepe and Alfredo count 11 crests to pass the raft in $\large{t}$ = 21.5 s.

So, the time period ( $\large{T}$ ) of oscillation of the wave is

$\large{T} = \dfrac{t}{11} = \dfrac{21.5}{11} = 1.95s$

So, the velocity ( $\large{V}$ ) of the wave is

$\large{V = \dfrac{\lambda}{T} = \dfrac{2 \times L}{T} = \dfrac{2 \times 3}{1.95}= 3.08 ms^{-1}}$

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