1) A ray of light that strikes a plane mirror PQ at an angle of incidence of 30°, is reflected from the plane
mirror and then strikes a second plane mirror QR
placed at 110° angles to the first mirror. The angle of
reflection at the second mirror is:
(a) 30°
(b) 45°
(c) 50°
(d) 900

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

Which of the following are guidelines to follow for obtaining accurate observations

What conclusion can be made based on the temperature of soil when the light hits the soil at 0°, 45°, and 90° angles in section 2 of the experiment? did your results support your hypothesis? why or why not?