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4 years ago

Explain why lenses are used for particular applications. ( please write a long detailed answer )

Physics

1 answer:

STALIN [3.7K]4 years ago

8 0

Answer:

Lenses are very important for us. Without lenses even we can't imagine the world. Without lenses our life is like life without colors.

Explanation:

Lenses are used everywhere around us in car, truck, glass, headlamps etc. It is also present in the flashlight of the LED light that is used in electronic materials.

Our eyes have also most amazing lenses. When you look at ground, at sky, and staring at moon all that happen that because of our binocular lenses. Our eyes have two type of lenses that concave lenses and convex lenses.

By these lenses we can see far and near object6s easily. Thus we used special applications of lenses to see the objects.

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What type of drawing is shown in the figure?

Rasek [7]

$Question$

What type of drawing is shown in the figure?

Answer:

Hi, There! My Answer would Be A. Block diagram Or C. panel Diagram!

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6 0

3 years ago

Starting with a constant velocity of 45 km/h, a car accelerates for 35 seconds at an acceleration of 0.45 m/s2 . What is the vel

DENIUS [597]

Answer:

28.3 m/s

Explanation:

Vi = 45 Km/h = 12.5 m/s

Vf - Vi = at

Vf -12.5 = 0.45(35)

Vf= 28.3 m/s

5 0

3 years ago

An object is placed a distance of 20 cm from a convex mirror of radius 40 cm. How far (in cm) is the image from the mirror?

Leona [35]

Answer:

Be sure you understand two optics principles: the focal length of a convex mirror is NEGATIVE (by convention) and R / 2 = f.

Find f, take its negative, plug in the mirror equation and obtain Di = - 24 cm. This indicates that the image is virtual (as it should be in a convex mirror), is erect (as all virtual images are), is diminished (as it should be) and INSIDE the mirror as it should be.

Explanation:

3 0

4 years ago

A surfer is able to stay on the surfboard as she rides the waves. Which explains the force(s) that enable her to do this? A. The

lyudmila [28]

ZC. The forward force of the surfboard's acceleration is balanced by the backward force of the surfer's mass.

3 0

4 years ago

Một mặt phẳng vô hạn tích điện đều, mật độ σ = 4.10-9 C/cm2, đặt thẳng đứng trong không khí. Một quả cầu nhỏ có khối lượng 8 g,

dusya [7]

Answer:

The angle is 18.3 degree.

Explanation:

A uniformly charged infinite plane, density σ = 4 x 10^-9 C/cm^2, is placed vertically in air. A small ball of mass 8 g, with charge q = 10^-8 C, hangs close to the plane, so that the string is initially parallel to the plane. Take g = 9.8m/s2. When in equilibrium, by what angle is the string hanging the ball to the plane?

surface charge density, σ = 4 x 10^-5 C/m^2

Charge, q = 10^-8 C

mass, m = 0.008 kg

Let the angle is A and the tension in the string is T.

The electric field due to a plane is

$E =\frac{\varepsilon \sigma }{2\varepsilon o}\\\\E =\frac{4\times 10^{-5}}{2\times 8.85\times 10^{-12}}\\\\E = 2.26\times 10^6 V/m \\$

Now equate the forces,

$T sin A = q E.... (1)\\\\T cos A = m g ..... (2)\\\\divide (1) by (2)\\\\tan A = \frac{10^{-8}\times 2.6\times 10^6}{0.008\times 9.8}\\\\tan A = 0.33\\\\ A = 18.3 degree$

5 0

3 years ago