The time taken by light to reach the earth is...? Mcqs

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The time taken by light to reach the earth is...?

(A) 4 minutes 15 seconds
(B) 8 minutes 15 seconds

(C) 10 minutes 15 seconds
(D) 7 minutes 15 seconds

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At what temperature are Celsius and Fahrenheit equal...?

(A) 10 degree
(B) -10 degree

(C) 40 degree
(D) -40 degree

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Which type of mirror is used in the head lights of vehicles...?

(A) Concave
(B) Convex

(C) Plain
(D) None of these

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The Planet with shortest daytime is...?

(A) Saturn
(B) Jupiter

(C) Neptune
(D) Mars

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The layer of atmosphere in which we live is called...?

(A) Stratophere
(B) Troposphere

(C) Lithosphere
(D) lonosphere

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Decibel is a unit used for:...?

(A) Speed of light
(B) Intensity of sound

(C) Intensity of heat
(D) None of these

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The brightest planet in the solar system is...?

(A) Satrun
(B) Venus

(C) Neptune
(D) Mars

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When light passes from one medium to another, this phenomenon of change in its direction is called:...?

(A) Refraction
(B) Reflection

(C) Diffraction
(D) Propagation

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A ball thrown vertically upwards, on reaching its highest point its value of acceleration due to gravity would be...?

(A) 9.8 m/s downwards
(B) 9.8 m/s upwards

(C) 0.8 m/s vertical
(D) None of these

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Sunlight is composed of...?

(A) 6 Colours
(B) 7 Colours

(C) 8 Colours
(D) 9 Colours

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