All categories

2 years ago

How does a plane mirror work

Physics

1 answer:

Nastasia [14]2 years ago

5 0

Answer:

Plane mirrors work because the light rays create a virtual image behind the mirror. Light rays from the object strike the mirror and reflect according to the law of reflection. ... Therefore, our eye and brain track the light rays backward to a position from which they appear to have come.

You might be interested in

In a particular case of an object in front of a spherical mirror with a focal length of +12.0 cm, the magnification is +4.00.(a)

salantis [7]

Answer:

9 cm

-36 cm

Explanation:

u = Object distance

v = Image distance

f = Focal length = 12

m = Magnification = 4

$m=-\frac{v}{u}\\\Rightarrow 4=-\frac{v}{u}\\\Rightarrow v=-4u$

Lens equation

$\frac{1}{f}=\frac{1}{u}+\frac{1}{v}\\\Rightarrow \frac{1}{12}=\frac{1}{u}+\frac{1}{-4u}\\\Rightarrow \frac{1}{12}=\frac{3}{4u}\\\Rightarrow u=9\ cm$

Object distance is 9 cm

$v=-4\times 9=-36\ cm$

Image distance is -36 cm (other side of object)

7 0

2 years ago

The mass luminosity relation L  M 3.5 describes the mathematical relationship between luminosity and mass for main sequence sta

ivanzaharov [21]

Answer:

(a) 11.3 L

(b) 10 M

Explanation:

The mass-luminosity relationship states that:

Luminosity ∝ Mass^3.5

Luminosity = (Constant)(Mass)^3.5

So, in order to find the values of luminosity or mass of different stars, we take the luminosity or mass of sun as reference. Therefore, write the equation for a star and Sun, and divide them to get:

Luminosity of a star/L = (Mass of Star/M)^3.5 ______ eqn(1)

where,

L = Luminosity of Sun

M = mass of Sun

(a)

It is given that:

Mass of Star = 2M

Therefore, eqn (1) implies that:

Luminosity of star/L = (2M/M)^3.5

Luminosity of Star = (2)^3.5 L

Luminosity of Star = 11.3 L

(b)

It is given that:

Luminosity of star = 3160 L

Therefore, eqn (1) implies that:

3160L/L = (Mass of Star/M)^3.5

taking ln on both sides:

ln (3160) = 3.5 ln(Mass of Star/M)

8.0583/3.5 = ln(Mass of Star/M)

Mass of Star/M = e^2.302

Mass of Star = 10 M

3 0

3 years ago

There are only 2 GENDERS and it proven with science

VikaD [51]

Answer:

https://young.scot/get-informed/national/gender-identity-terms

Explanation:

6 0

2 years ago

Sort each item to the correct location,

Hitman42 [59]

Answer:

the orbits of the planets are elliptical

the sun is the center of the solar system

includes 9 planets

3 0

2 years ago

A. What is the frequency of blue light that has a wavelength of 450 nm?

erastova [34]

Answer

a)Given,

Wavelength of blue light = 450 n m = 450 x 10⁻⁹ m

Speed of light = 3 x 10⁸ m/s

we know,

$c = \nu \lambda$

$\nu = \dfrac{c}{\lambda}$

$\nu = \dfrac{3\times 10^8}{450\times 10^{-9}}$

$\nu = 6.67 \times 10^{14}\ Hz$

b)Given,

Wavelength of red light = 650 n m = 650 x 10⁻⁹ m

Speed of light = 3 x 10⁸ m/s

we know,

$c = \nu \lambda$

$\nu = \dfrac{c}{\lambda}$

$\nu = \dfrac{3\times 10^8}{650\times 10^{-9}}$

$\nu = 4.62 \times 10^{14}\ Hz$

3 0

3 years ago