According to the law of reflection, if the angle of incidence is 45 degrees, what is the angle of reflection?
135 degrees
180 degrees
90 degrees
45 degrees

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's

Mass (kg) force (n) 5 25 10 50 15 75 20 100 a student was trying to find the relationship between mass and force. he placed four different masses on a table and pulled them using a spring scale. the table shows the different masses used in the experiment and the force required to pull each mass. the student concluded that more force was required to pull heavier objects. what comment would you make regarding his conclusion? a) no clear relation can be observed between mass and force from the data. b) there is a direct proportion between the mass and force listed in the table. c) gravity should have been taken into account while performing the experiment. d) there is an inverse proportion between the mass and force listed in the table.

What sort of waves exhibit the doppler effect?