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Number of visible lines in Balmer serie...

Number of visible lines in Balmer series.

A

2

B

4

C

3

D

5

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To determine the number of visible lines in the Balmer series, we can follow these steps: ### Step 1: Understand the Balmer Series The Balmer series is a set of spectral lines corresponding to transitions of electrons in a hydrogen atom from higher energy levels (n ≥ 3) to the second energy level (n = 2). ### Step 2: Identify the Visible Wavelength Range The visible spectrum for human eyes typically ranges from approximately 400 nm (violet) to 700 nm (red). ### Step 3: Determine the Transitions in the Balmer Series The transitions in the Balmer series are as follows: - n = 3 to n = 2 (H-alpha, red line) - n = 4 to n = 2 (H-beta, blue-green line) - n = 5 to n = 2 (H-gamma, blue line) - n = 6 to n = 2 (H-delta, violet line) ### Step 4: Check the Wavelengths of Each Transition The wavelengths for the first four transitions in the Balmer series are: 1. H-alpha (n=3 to n=2): ~656 nm (visible) 2. H-beta (n=4 to n=2): ~486 nm (visible) 3. H-gamma (n=5 to n=2): ~434 nm (visible) 4. H-delta (n=6 to n=2): ~410 nm (visible) All these wavelengths fall within the visible range of 400 nm to 700 nm. ### Step 5: Count the Visible Lines Since all four transitions result in visible lines, we conclude that there are 4 visible lines in the Balmer series. ### Final Answer The number of visible lines in the Balmer series is **4**. ---
To determine the number of visible lines in the Balmer series, we can follow these steps: ### Step 1: Understand the Balmer Series The Balmer series is a set of spectral lines corresponding to transitions of electrons in a hydrogen atom from higher energy levels (n ≥ 3) to the second energy level (n = 2). ### Step 2: Identify the Visible Wavelength Range The visible spectrum for human eyes typically ranges from approximately 400 nm (violet) to 700 nm (red). ...
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