Physics Questions and Answers
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
The amplitude of a sound wave determines its
frequency
quality
loudness
pitch
Correct answer is C
No explanation has been provided for this answer.
Which of the following electromagnetic wave has the longest wavelength?
radio-waves
gamma rays
infrared waves
ultraviolet rays
Correct answer is A
No explanation has been provided for this answer.
A lens that is thinner at the middle and thicher at the edges is
diverging
converging
plano-convex
converging meniscus
Correct answer is A
No explanation has been provided for this answer.
A ray of light travels from air to water. The refeactive index of water is given by the expression
\(\frac{\text{velocity in water}}{\text{velocity in air}}\)
\(\frac{\text{sine of angle of refraction}}{\text{sine of angle of incidence}}\)
\(\frac{\text{apparent depth}}{\text{real depth }}\)
\(\frac{\text{wavelength in air}}{\text{wavelength in water}}\)
Correct answer is D
No explanation has been provided for this answer.
From the diagram, the correct equation for the refractive index n of the medium is
n = tan i
n = \(\frac{sin i}{sin 90^o}\)
n = \(\frac{sin i}{cos (90^o - i)}\)
n = sin 90oC
Correct answer is A
refractive index(n) = \(\frac{sin i}{sinr}\)
where r = 180-(90+i) → r=90-i
since sin(90-i)=cos i
: refractive index(n) = \(\frac{sin i}{cos i}\)
→ tan i