πŸ“’ Too many exams? Don’t know which one suits you best? Book Your Free Expert πŸ‘‰ call Now!


    Question

    Consider the following statements: Assertion (A):

    In the visible spectrum of light, red light has more energy than green light. Reason (R): The wavelength of red light is greater than that of green light. Choose the correct answer from the codes given below:
    A Both A and R are true, and R is the correct explanation of A. Correct Answer Incorrect Answer
    B Both A and R are true, but R is not the correct explanation of A. Correct Answer Incorrect Answer
    C A is true, but R is false. Correct Answer Incorrect Answer
    D A is false, but R is true. Correct Answer Incorrect Answer

    Solution

    β€’ Red light has a longer wavelength compared to green light; thus, Reason (R) is correct. β€’ However, energy is inversely proportional to wavelength (E ∝ 1/Ξ»). This means shorter wavelength light has more energy than longer wavelength light. β€’ Therefore, green light has more energy than red light, making Assertion (A) false. Thus, the correct answer is (d) A is false, but R is true. οƒ˜ Energy of light is given by the formula E = hΞ½ = hc/Ξ», where h = Planck’s constant, Ξ½ = frequency, c = speed of light, and Ξ» = wavelength. οƒ˜ In the visible spectrum, violet light has the highest energy, and red light has the lowest. οƒ˜ Wavelength order (longest to shortest): Red > Orange > Yellow > Green > Blue > Indigo > Violet. οƒ˜ Energy order (lowest to highest): Red < Orange < Yellow < Green < Blue < Indigo < Violet. οƒ˜ Green light has a shorter wavelength than red, so it carries more energy. οƒ˜ Red light is used in night vision equipment because of its low energy and low scattering property. οƒ˜ Green light is more energetic and is often used in applications like laser pointers and signaling.

    Practice Next
    More Static GA Questions
    ask-question