Question

In the following question from statement-1 (Assertion) is followed by statement-2 (Reason) Each question has the following four choice out of which only one choice is correct (a) Statement- 1 is true, statement \(-2\) is true. Statement \(-2\) is a correct explanation for statement-1. (b) Statement-1 is true, statement-2 is true, statement-2 is not a correct explanation for statement-1. (c) Statement- 1 is true, statement \(-2\) is false (d) Statement-1 is false, statement \(-2\) is true. Statement-1 :- sky wave communication is not suitable for frequencies greater than \(30 \mathrm{MHz}\). Statement \(-2:-\) High frequency signals die out before reaching the ionosphere. (A) a (B) \(b\) (C) \(c\) (D) \(\mathrm{d}\)

Short answer

The short answer is: (c) Statement- 1 is true, statement -2 is false.

Step-by-step solution

: We need to first comprehend the meaning and context of the two statements. Statement-1: Skywave communication is not suitable for frequencies greater than 30 MHz. Skywave communication is a method for transmitting radio signals by bouncing them off the ionosphere back to the Earth. The statement is implying that this communication technique is not suitable for frequencies above 30 MHz. Statement-2: High-frequency signals die out before reaching the ionosphere. This statement suggests that signals with higher frequencies are unable to reach the ionosphere and thus cannot be reflected back to Earth for sky wave communication. #Step 2: Determine the truth of each statement#

: Now that we have understood the context and meaning of both statements, we need to verify whether each statement is true or false. Statement-1: True. Skywave communication is limited to frequencies below 30 MHz because at higher frequencies, signals penetrate the ionosphere, and are not reflected back to Earth. Statement-2: False. The reason for the limitation of sky wave communication to frequencies below 30 MHz is not that high-frequency signals die out before reaching the ionosphere. The actual reason is that the higher frequency signals penetrate the ionosphere instead of being reflected, making them unsuitable for sky wave communication. #Step 3: Analyze the relationship between the statements#

: As we have verified the truth or falsehood of the statements, now we will analyze their relationship. That is, we need to determine if Statement-2 is a correct explanation for Statement-1. Since Statement-2 is false, it cannot be a correct explanation for the true Statement-1. #Step 4: Select the best answer option#

: Based on the analysis in Step 3, we will now choose the appropriate answer option: (a) Statement- 1 is true, statement -2 is true. Statement -2 is a correct explanation for statement-1. (b) Statement-1 is true, statement-2 is true, statement-2 is not a correct explanation for statement-1. (c) Statement- 1 is true, statement -2 is false (d) Statement-1 is false, statement -2 is true. The correct answer is (c) Statement- 1 is true, statement -2 is false.