Question 1

Which color is absorbed and which color is reflected by the leaves of most plants?

(A) Blue and green are absorbed, red is reflected.
(B) Red and blue are absorbed; green is reflected
(C) Green and violet are reflected, red is absorbed
(D) Red and violet are reflected, green is absorbed.

Question 3

Which statement is true about the part of the electromagnetic spectrum that human eyes can detect?

(A) It contains ultraviolet, visible, and infrared light.
(B) It is divided into seven ranges of wavelengths
(C) It contains only the colors of the rainbow and television waves.
(D) It is divided into nine ranges of wavelengths.

Question 5

What enables humans to "see" light in the infrared range of the electromagnetic spectrum?

(A) thermogram
(B) video camera
(C) UV sensor
(D) RFID chip

Question 7

Which statement is most accurate?

(A) The greater the optical density of the material, the lower the refractive index.
(B) The greater the physical density of a material, the higher the refractive index.
(C) The more optically dense the material, the higher the refractive index.
(D) The greater the physical density of a material, the lower the refractive index.

Question 9

In a concave mirror, if an object is located between the center of curvature and the focal point, what is the best way to describe the image formed?

(A) light rays travel parallel to each other, no image formed
(B) real, inverted, and smaller than the object
(C) real, inverted, and larger than the object
(D) real, inverted, and the same size as the object