상가임대차보호법에서 가장 강력한 무기는 바로 계약갱신요구권이에요. 임차인이 임대차 기간이 만료되기 6개월 전부터 1개월 전까지 사이에 계약 갱신을 요구하면, 임대인은 정당한 사유 없이 이를 거절하지 못해요.
자주 묻는 질문
What techniques did Newton visualised using light?
Isaac Newton used a glass prism to split
white light into seven colors.
Name two types of reflection.
Regular reflection and irregular reflection.
Which mirror has a larger field of view?
Convex mirror
State the laws of reflection.
1. The angle of incidence is equal to the angle of reflection.
2. The incident ray, the reflected ray, and the normal at the point of incidence, all lie in the same plane.
What is lateral inversion?
The phenomenon in which the left side of an object appears to be the right side of the image and vice-versa is called lateral inversion.
Name the two types of lenses.
Convex lens and Concave lens.
Define lateral inversion.
The phenomenon in which the left of an object appears to be the right of the image in a mirror and vice-versa is called lateral inversion.
Which mirror is used in headlights of vehicles?
Concave mirror
Explain regular reflection.
When light falls on a smooth surface, it is reflected in a definite direction. Such a reflection is called a regular reflection.
Explain irregular reflection.
When light falls on an uneven surface, it is reflected in different directions. Such a reflection is called an irregular reflection.
State the characteristics of an image formed by a plane mirror.
The image formed by a plane mirror is:
1. Erect and virtual.
2. Of the same size as the object.
3. Formed at the same distance behind the mirror as the object is in front of it.
4. Laterally inverted.
Name the type of lens that behaves as a- (a) converging lens (b) diverging lens.
(a) Convex lens
(b) Concave lens
Identify the type of mirror used as- (a) Rear view mirror (b) Shaving mirror.
(a) Convex mirror
(b) Concave mirror
Write two uses of a concave mirror.
1. It is used as a shaving mirror.
2. It is used in searchlights and headlights of vehicles.
Write two uses of a convex mirror.
1. It is used as a rear-view mirror in vehicles.
2. It is used in street lights as a reflector.
Write two uses of a convex lens.
1. It is used in magnifying glasses.
2. It is used in spectacles to correct hypermetropia (farsightedness).
Write two uses of a concave lens.
1. It is used in spectacles to correct myopia (nearsightedness).
2. It is used in spyholes of doors.
Differentiate between real and virtual images.
Real Image:
- Can be obtained on a screen.
- Formed by actual intersection of light rays.
- Always inverted.
Virtual Image:
- Cannot be obtained on a screen.
- Formed when light rays appear to meet.
- Always erect.
Differentiate between concave and convex mirrors.
Concave Mirror:
- Reflecting surface is curved inwards.
- Can form both real and virtual images.
- Can form magnified, same size, or diminished images.
Convex Mirror:
- Reflecting surface is curved outwards.
- Always forms virtual images.
- Always forms diminished images.
Differentiate between concave and convex lenses.
Concave Lens:
- Thinner in the middle than at the edges.
- Diverges light rays.
- Always forms virtual, erect, and diminished images.
Convex Lens:
- Thicker in the middle than at the edges.
- Converges light rays.
- Can form both real and virtual, magnified or diminished images depending on the object's position.
Show with help of a diagram that a relationship exists between angle of incidence and angle of reflection.
According to the laws of reflection, the angle of incidence ($i$) is always equal to the angle of reflection ($r$).
$$\angle i = \angle r$$
What is a prism? With the help of a diagram, show the path of a ray of light passing through a prism.
A prism is a transparent optical element with flat, polished surfaces that refract light. At least two of the flat surfaces must have an angle between them.
Diagram:
[Diagram showing a triangular prism with an incident ray of light. The ray refracts (bends) as it enters the prism, travels through it, and refracts again as it exits, splitting into a spectrum of colors (dispersion).]
What is Newton's disc? What is the purpose of this experiment?
Newton's disc is a circular disc with segments painted in the seven colors of the rainbow (VIBGYOR). When the disc is rotated rapidly, the colors blend together, and the disc appears white. This experiment demonstrates that white light is made up of seven constituent colors.
LightReflectionMirrorsLensesRainbow
