9. On increasing the size of the hole of a pin hole camera we get......... image of the same
A) Ciear
B) Enlarge
C Blunted
D) Multiple
10. Which material can be used to make the reflective surface of a plane mirror
A) Silver
B) Aluminium C) Magnesium D)A& B
11. The principle that states light takes the shortest path to travel was given by
A) Isaac Newton B) Pierre de cardin Pierre de fermat D) Christian Huygens
12. According to the laws of reflection, angle of reflection is equal to the
A) Angle of incidence
B)Angle of prism
C) Angle of refraction
D) Angle of repose
13. Plane of reflection contains
A) Incident ray B) Reflected ray C) Normal
D)A. B, C
14. Plane mirrors cannot be used in
A) Periscope B) Kaleidoscope Rear view
D) Both A&C
15. Which of the following is not an application of plane mirrors
A) Rear view mirror
B) Reflector in torch light
C) Dentist's mirror
D) A,B,C
16. If there is reflection of light from plane mirror, we will get
A) Clear image B) Blurred image
D) None
C) No image
17. The height of an image formed by a plane mirror is
A) Equal to the height of the object B) Smaller than height of the object
C) Larger than the height of the object D) Highly diminished
18. Which of the following about images formed by a plane mirror is incorrect
A) Images formed by a plane mirror are real in nature
B) Images formed by a piane millorare velual in nature
C) Images formed by a plane mirror can be projected on a screen.
D) Images formed by a plane mirror has the same dimensions as that of the object
Answers
Answer:
p-l-s bro I need some point p-l-s don't report it
Technological innovation. A new computer is invented that will help William study more and debate more. Show what happens in the PPF graph from problem 1. Assume that the opportunity cost of studying and debating do not change. And assume the effects of the technological innovation affect debate and studying equally. Label the new PPF as PPF1.
Technological devastation. A computer virus devastates William's computer. William needs to use the local computer lab on the other side of campus to do his studies and debate research. This is a huge inconvenience for William, so he is unable to study and debate as much as before. Show what happens in the PPF graph from problem 1. Assume that the opportunity cost of studying and debating do not change. And assume the effects of the computer virus affect debate and studying equally.
Label the new PPF as PPF2.
What are the factors that will shift the PPF?
What are the factors that will shift a point along the PPF?
What are the factors that will shift a point along the PPF?