All electromagnetic waves in a vacuum have the same
wavelength
frequency
speed
amplitude
Correct answer is C
No explanation has been provided for this answer.
0.5
1.5
2.0
3.0
Correct answer is D
\(\frac{1}{U} + \frac{1}{V} = \frac{1}{F}\)
\(\frac{1}{V} = \frac{1}{F} - \frac{1}{U}\)
\(\frac{1}{V} = \frac{1}{15} - \frac{1}{20}\)
\(\frac{1}{V} = \frac{\text{4 - 3}}{60}\)
\(\frac{1}{V} = \frac{1}{60}\)
V = 60cm
M = \(\frac{V}{U} = \frac{60}{20}\)
M = 3.0cm
Red light travels faster than blue light when both of them pass through a glass prism because the
refractive index of red light is grester than that of blue light
refractive index of blue light is greater than that of red light
red light is more intense than the blue light
blue light is more intense than the red light
Correct answer is D
No explanation has been provided for this answer.
23m
128m
288m
298m
Correct answer is B
V = \(\frac{2nx}{E}\)
= \(\frac{2 \times 1 \times X}{0.8} = 320\)
2x = 0.8 x 320
x = \(\frac{0.8 \times 320}{2}\)
= 128m
one quarter of the wavelength
half of the wavelength
the wavelength
twice the wavelength
Correct answer is B
No explanation has been provided for this answer.