The following sketch represents a specific wave of light. What will be the color of the light represented by this wave?

$A$ metal surface emits photoelectrons when the incident radiation possesses a minimum.....

Explain the reason for the formation of a spectrum.

$A$ metal surface is exposed to solar radiation.

Which of the following travels with the speed of light?

Identify the correct statements from the following:
$I$) Isotopes of an element show different chemical behaviour
$II$) Lyman series of lines of hydrogen spectrum appear in $UV$ region
$III$) The oscillating electric and magnetic field components of electromagnetic radiation are perpendicular to each other and both are perpendicular to the direction of propagation of radiation