Which of the following statements about electromagnetic radiation is true?

Physics

1 answer:

madam [21]3 years ago

8 0

Answer:

The correct option is B: It consists of perpendicularly oscillating electric and magnetic fields, and the direction of propagation is perpendicular to both.

Explanation:

Electromagnetic radiation travels at the speed of light (c = 3x10⁸ m/s) only in a vacuum. In another propagation medium, the speed of electromagnetic radiation is less than c.

The oscillations of the waves of the electric and magnetic fields are perpendicular to each other, and the direction of propagation is also perpendicular to the two fields.

From all of the above, the correct option is B: It consists of perpendicularly oscillating electric and magnetic fields, and the direction of propagation is perpendicular to both.

I hope it helps you!

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The image produced by an object is –10.0 cm from a concave mirror that has a focal length of 5.0 cm. The distance of the object

Gennadij [26K]

Given:
Focal length: 5.0 cm
image produced: -10.0 cm

mirror equation: 1/di + 1/do = 1/f

Look for the actual distance of the object from the mirror. Solve for do.

1/do + 1/(-10) = 1/5
1/do = 1/5 + 1/10
1/do = (1/5 * 2/2) + (1/10 * 1/1)
1/do = 2/10 + 1/10
1/do = 3/10
10 = 3do
10/3 = do
3.33 = do

The distance of the object from the mirror, rounded to the nearest centimeter is 3 cm.

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4 years ago

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Answer:

See the explanation below

Explanation:

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