Question

Traction and angle of incidence is greater than critical angle.
all the above
A wave travelling in a rarer medium to a denser medium undergoes a phase change of
1
a) Zero
b) 1/2
d) 2a
Duration of day time is greater than night time due to
a) Refraction of light
c) T​

Answer 1

Answer:

1,π or 180°. 2, Refraction of light