Answer:
The answer is <em>D. In the direction of the wave</em>
Explanation:
I took the test, hope this helps! :)
Argon<span> gas is used in fluorescent and incandescent light </span>bulbs<span> to stop the oxygen in the light </span>bulbs<span> from corroding the hot tungsten filament.The use of </span>argon<span> in light</span>bulbs<span> prevents the evaporation of the tungsten filaments, which results in increased light </span>bulb<span> life.</span>
First of all due to heavy rainfall , people are facing different current and electric circuit issues ..Heavy ranfall and thunder storm is the main reason of the issue.. So , The conclusion are given below -"
•We can make the roadside wires underground .
•We can also follow basic safety measures .
•We can avoid using devices having wifes with the plugin .
•We can use non-Elextirc devices more .
Solar system is nested nearly 2/3 of the way from the center of the galaxy to the outskirt of the galactic disc.
Magnification is the ratio of the image's height to object's height or the ratio of image distance to object distance.
That is; Magnification = height of the image/height of object= image distance/object distance
= x/4 = 21/8
x = (21 × 4)/8
= 10.5 cm
The height of the image is 10.5 cm
The mirror in this case is a concave mirror, since when the object is placed between the principal focus and the concave mirror, it forms a virtual magnified image on the other side ofthe mirror (that is why we have a negative image distance).