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Light year is the unit of time...

Light year is the unit of time

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To determine whether the statement "Light year is the unit of time" is true or false, we can follow these steps: ### Step 1: Understand the Definition of a Light Year A light year is defined as the distance that light travels in a vacuum in one year. ### Step 2: Identify the Nature of the Unit Since a light year measures distance (not time), it is important to recognize that it quantifies how far light travels, rather than how long it takes. ### Step 3: Analyze the Statement The statement claims that a light year is a unit of time. However, based on the definition, it is clear that a light year is a unit of distance. ### Step 4: Conclude the Truth Value of the Statement Since a light year is a unit of distance and not time, the statement "Light year is the unit of time" is false. ### Final Answer The statement "Light year is the unit of time" is **False**. ---
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Knowledge Check

  • Consider the following statements. I. Loudness of sound is measured in decibel (dB). II. Quality of sound is related to the wavefront. III. Loudness of sound is related to amount of sound passing each second through unit area in medium. IV. Light year is the unit of time. Which of the statement (s) is /are true ?

    A
    I, II and IV
    B
    I,III and IV
    C
    I and III
    D
    I, II and III
  • Statement-1: Light year is a unit of time Statement-2: Light year is the distance traveled by light in vacuum in one year.

    A
    Statement-1 is true and statement -2 is true
    B
    Statement -1 is true and statement-2 is false
    C
    Statement-1 is false and statement -2 is true
    D
    Statement-1 is false and statement -2 is false
  • Assertion: Light year is the distance that light travels with velocity of 3xx10^(8)ms^(-1) in one year. Reason: Light year is the unit for measuring time.

    A
    if both assertion and reason are true reason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation fo assertion.
    C
    If assertion is true but reaso is false.
    D
    IF both assertion and reason are false.
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