Question

A B C or D
question 5 4-1

Answer 1

The correct option is a. The speed remains the same and the frequency is halved.

The speed of a wave in a vacuum is determined by the fundamental constant, the speed of light (c), which is approximately
`\(3 * 10^8\)` meters per second. The speed of light is constant for all electromagnetic waves in a vacuum.

The relationship between the speed (c), frequency (f), and wavelength (λ) of a wave is given by the equation:

`\[ c = f \lambda \]`

Where:

-
`\( c \)` is the speed of light,

-
`\( f \)` is the frequency,

-
`\( \lambda \)` is the wavelength.

If the wavelength
`(\( \lambda \))` doubles, according to the equation, the frequency
`(\( f \))` must decrease to keep the product
`(\( c \))` constant. Therefore, the correct option is a. The speed remains the same and the frequency is halved.