Multiple Choice Directions. Choose the correct answer for each number
1 What type of electromagnetic waves is used in Radar?
A Radio waves
C. Infrared
B Microwaves
D. Visible light
2. The following could help us protect ourselves from the harmful effects of ultraviolet radiation EXCEPT
A. Sunscreen/sunblock lotions
B. Sunglasses/eyeglasses with filters
C: Umbrella
D. Water
3. Which of the following is one of the benefits of ultraviolet radiation?
A Used in diagnosing bone fractures and tumors
B. Induce mutation in plants and animals C. Radiation therapy
D. Authentication of documents
4. What type of electromagnetic waves is used to detect fake and counterfeit money
A. Radio waves
C. Infrared
B. Microwaves
D. UV rays
5. The image you see in a plane mirror is called image because it appears somewhere behind the mirror.
A. Virtual
C. Imaginary
B. Physical
D. Reflected
6. Your bathroom mirror can be classified as a mirror.
A. Curved
C. Standard
B. Plane
D. Reflective
7. The angle of incidence is the angle of reflection.
A. Greater than
C. Equal to
B. Less than
D. Greater or less than
8. What is the distance of your image from you if you stand 1.5 m in front of a plane mirror?
A. 1.5 m
C. 3.0 m
B. 2.0 m
D. 4.5 m
9. The horizontal line passing through the center of the sphere.
A. Principal axis
C. Vertex
B. Focal point
D. Center of Curvature
10. A smooth and highly polished reflecting surface is called
A. looking glass
C. Lens
B. Mirror
D. Both A and B
11. The angle of incidence is equal to angle of reflection.
A. Sometimes
C. Never
B. Always
D. Cannot say
12. The image of an object in a spherical mirror appears magnified, erect and behind it. The spherical mirror is
A Concave
C. Plane
B. Convex
D. None of these
13. The image formed by a concave mirror is virtual and magnified, when object is placed A. At infinity
B. At focal point of a concave mirror
C. in between the principal focus and the pole of concave mirror
D. At center of curvature of concave mirror ​