A concave mirror can be used to produce a parallel beam of light if a lighted bulb is placed
A simple microscope forms an image 10cm from an eye close to the lens. If the object is 6cm from the eye, calculate the focal length of the lens
When white light passes through a triangular glass prism, there is dispersion because of
In which of the following media does sound travel faster?
A turning fork of frequency 600Hz is sounded over a closed resonance tube. If the first and second resonant positions are 0.130m and 0.413m respectively, calculate the speed of sound in air
