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3 years ago

What happens to parallel light rays that strike a concave lens?

Physics

2 answers:

zhenek [66]3 years ago

5 0

Due to the shape of the lens , parallel rays will be deviated

Aleonysh [2.5K]3 years ago

3 0

Answer: When parallel light rays strike a concave lens, they will diverge that is they spread out.

Concave lens is also known as diverging lens, which means that when parallel rays of light strike on it, the lens spreads out the light rays ( that is it diverges the rays of light) that are refracted through it.

It is thinner at center as compared to edges and used to correct myopia ( a defect of vision that is also termed short-sightedness).

Therefore, when parallel light rays strike a concave lens, they will diverge that is they spread out.

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A proton, an electron, and a helium nucleus all move at speed v. Rank their de Broglie wavelengths from largest to smallest. Wri

MatroZZZ [7]

Answer:

The correct option is 'c':electron,proton,helium nucleus

Explanation:

The De-Broglie's wavelength of particle is given by

$\lambda =\frac{h}{mv}$

Thus we can see that wavelength is inversely related to mass of the particle since 'h' (Plank's constant) and velocity is same for all the particles

Thus we conclude that the the lightest particle will have the most wavelength

Electron being the lightest of the 3 particles will have the largest wavelength thus the correct option is 'c'. Since electron has the largest wavelength followed by proton and the least wavelength among the 3 is of helium.

6 0

4 years ago

A ball rolls from x=3.85m to x=22.1m in 5 seconds. What was its average velocity

Vadim26 [7]

Answer:

Average Velocity = 3.65 m/s

Explanation:

Average Velocity $=\frac{Total Displacement}{Total Time}$ $=\frac{22.1-3.85}{5}=\frac{18.25}{5}=3.65$

3 0

2 years ago

Once Kate's kite reaches a height of 50 ft (above her hands), it rises no higher but drifts due east in a wind blowing 7 ft d

Margaret [11]

Answer:

dz = 7.136 (answer)

Explanation:

given height for kate's kite = 50 ft (say y)

due to drift it move towards east = dx = 7 ft

string maximum length = 107 ft ( say z)

we have to find change in z

that is dz

it will form a right angle triangle for x , y and z where x is base y is height and z is hypotenuse

so we get according to Pythagoras Theorem

$z^2 = x^2+y^2\\$ ...............(i)

by derivative both side consider y as constant

$2zdz = 2xdx\\dz = {xdx }/z$

from (i) equation

$x = \sqrt{z^2-y^2}$

$dz = \sqrt{z^2-y^2}dx/z$

now put the value and find dz

$dz = (\sqrt{120^2-50^2)}7/107\\ =((\sqrt{14400 -2500} )\times7)/107$

after solving these we get

$dz =\frac{109.08\times7}{107}$

dz = 7.136 (answer)

7 0

3 years ago

A spaceship moves at a speed of 0.95 c away from the Earth. It shoots a star wars torpedo toward the Earthat a speed of 0.90 c r

wariber [46]

Answer:

0.345 c

Explanation:

$v_{se}$ = velocity of spaceship relative to earth = 0.95 c

$v_{ts}$ = velocity of torpedo relative to spaceship = - 0.90 c

$v_{te}$ = velocity of torpedo relative to earth

Velocity of torpedo relative to earth is given as

$v_{te}=\frac{v_{se} + v_{ts}}{1 + \frac{v_{se}v_{ts}}{c^{2}}}$

$v_{te}=\frac{0.95c + (- 0.90 c)}{1 + \frac{(0.95 c)(- 0.90 c))}{c^{2}}}$

$v_{te}$ = 0.345 c

5 0

3 years ago

imagine a square column of the atmosphere, 10 m on a side, that extends all the way to the top of the atmosphere.

vampirchik [111]

The calculated weight in newtons is 10 N.

Listed below is the data we will use:

Area A is where the pressure is P. Here are the details we were given:

A=1 cm2, P=101325 N/m, and w=?

Do the area conversion to square meters.

A=1cm2×1m2/1002cm2\s=1×10−4m2

From the definition of pressure, calculate the weight of the air column. In this instance, the air column's weight is determined by multiplying the atmospheric pressure by the air column's base area.

Fw = P atm A

= (101325N/m2) (1 10 4m2)

= 10N

The complete question is - Imagine a square column of the atmosphere, 1 cm on a side, that extends all the way to the top of the atmosphere. How much does this column of air weigh in newtons?

Learn more about Pressure here-

brainly.com/question/8648295

#SPJ4

4 0

2 years ago