3 years ago

What period can you find the element thallium in??

1 answer:

4 0

Other families might be more private, so a girl might not know exactly what to say or whom to tell. But this news needs to be shared, at least with one grown-up in the family. You might just pull the person aside and say it clearly, like this: "I got my first period today. Do you think you can help me get some supplies?"

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3 years ago

Light of wavelength 597 nm falls on a double slit, and the first bright fringe of the interference pattern is seen at an angle o

Kazeer [188]

Answer:

2.2 µm

Explanation:

For constructive interference, the expression is:

$d\times sin\theta=m\times \lambda$

Where, m = 1, 2, .....

d is the distance between the slits.

Given wavelength = 597 nm

Angle, $\theta$ = 15.8°

First bright fringe means , m = 1

So,

$d\times sin\ 15.8^0=1\times \597\ nm$

$d\times 0.2723=1\times \597\ nm$

$d=2192.43481\ nm$

Also,

1 nm = 10⁻⁹ m

1 µm = 10⁻⁶ m

So,

1 nm = 10⁻³ nm

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Distance between slits ≅ 2.2 µm

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Answer:

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