Carefully analyses the diagram and choose the correct option :
$i$ and $ii$ are true
$i$ and $iii$ are true
$i$ and $iv$ are true
$ii$ and $ii$ are true
The rays of light first converge and then diverges.
According to corpuscular theory of light, the different colours of light are due to
Which one of the following phenomena is not explained by Huygen's construction of wavefront
Derive the laws of refraction from the concept (Huygen's principle) of the wavefront.
Explain the wavefront and its types.
What is the shape of the wavefront on earth for sunlight?
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