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svet-max [94.6K]
3 years ago
15

Which type of mirror causes light to spread out?

Physics
2 answers:
PSYCHO15rus [73]3 years ago
7 0

<u>Answer:</u> The mirror that causes light to spread out is convex mirror

<u>Explanation:</u>

There are 2 types of spherical mirror:

  • Convex mirror is defined as the mirror which diverges the light falling on it. It is considered as a diverging mirror.  They spread out the light falling on it.
  • Concave mirror is defined as the mirror which converges the light falling on it. It is considered as a converging mirror. They spread in the light falling on it.

Plane mirror is defined as the plane reflecting mirror. The image produced by it is virtual, upright and of the same size and shape as that of the object.

Hence, the mirror that causes light to spread out is convex mirror

saw5 [17]3 years ago
3 0
A convex mirror makes a reflected light rays spread out.
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Maximum voltage produced in an AC generator completing 60 cycles in 30 sec is 250V. (a) What is period of armature? (b) How many
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a. 2 Hz b. 0.5 cycles c . 0 V

Explanation:

a. What is period of armature?

Since it takes the armature 30 seconds to complete 60 cycles, and frequency f = number of cycles/ time = 60 cycles/ 30 s = 2 cycles/ s = 2 Hz

b. How many cycles are completed in T/2 sec?

The period, T = 1/f = 1/2 Hz = 0.5 s.

So, it takes 0.5 s to complete 1 cycles. At t = T/2 = 0.5/2 = 0.25 s,

Since it takes 0.5 s to complete 1 cycle, then the number of cycles it completes in 0.25 s is 0.25/0.5 = 0.5 cycles.

c. What is the maximum emf produced when the armature completes 180° rotation?

Since the emf E = E₀sinθ and when θ = 180°, sinθ = sin180° = 0

E = E₀ × 0 = 0

E = 0

So, at 180° rotation, the maximum emf produced is 0 V.

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3 years ago
An engine has an energy input of 125 J, and 35 J of that energy is transformed into useful energy. What is the efficiency of the
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2 years ago
An airplane cruises at 900 km/h relative to the air. It is flying from Denver, Colorado, due west to Reno, Nevada, a distance of
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Answer:

26.5 minutes

Explanation:

When the airplane is flying due West from Denver to Reno, the due-East wind with speed of 80km/h would reduce the ground speed by 80 km/h.

Its Denver to Reno ground speed is 900 - 80 = 720 km/h

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On the other hand, when it returns from Reno to Denver in the due-East direction, the due-East wind with speed of 80km/h would add to the ground speed by 80 km/h

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The difference it flight time would be 1.67 - 1.22 = 0.44 hours or 26.5 minutes

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3 years ago
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