3 years ago

HEEELLPPPP ME LLELLLLEEAASEEEEEEEEEEEE

Physics

1 answer:

irina [24]3 years ago

4 0

Answer:

Valley-river Landslide-Gravity Frost wedging- Glacier Canyon-Ice.

Explanation:

I think that's right

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Suppose that you observe light emitted from a distant star to be at a wavelength of 525 nm. The wavelength of light to an observ

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Answer:

The velocity of the star is 0.532 c.

Explanation:

Given that,

Wavelength of observer = 525 nm

Wave length of source = 950 nm

We need to calculate the velocity

If the direction is from observer to star.

From Doppler effect

$\lambda_{0}=\sqrt{\dfrac{c+v}{c-v}}\times\lambda_{s}$

Put the value into the formula

$525=\sqrt{\dfrac{c+v}{c-v}}\times950$

$\dfrac{c+v}{c-v}=(\dfrac{525}{950})^2$

$\dfrac{c+v}{c-v}=0.305$

$c+v=0.305\times(c-v)$

$v(1+0.305)=c(0.305-1)$

$v=\dfrac{0.305-1}{1+0.305}c$

$v=−0.532c$

Negative sign shows the star is moving toward the observer.

Hence, The velocity of the star is 0.532 c.

7 0

3 years ago

Please help me !! i’ll mark brainliest if you’re right!

navik [9.2K]

Option 2nd is the answer

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olga2289 [7]

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A failure of the red-sensitive nerves in the eye to respond to light properly causes

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