የምዕራፍ ማስታወሻዎችና የመልመጃ ጥያቄዎች

የ10ኛ ክፍል ፊዚክስ ምዕራፍ 6

በዚህ ገጽ ያለው ሁሉ ለ10ኛ ክፍል የፊዚክስ መፅሐፍ ምዕራፍ 6 ነው፦ ምዕራፉ የሚሸፍነው፣ አጭር ማስታወሻዎቹ፣ የመልመጃ ጥያቄዎች ከመልሶቻቸው ጋር፣ እና ቪዲዮ ባለበት የትምህርቱ ቪዲዮ።

5
ካርዶች: 10
የምዕራፍ 6 የመልመጃ ጥያቄዎች

ምዕራፍ 6 የሚሸፍነው

1.Electromagnetic Waves
2.EM Spectrum
3.Light as a wave
4.Laws of reflection & Refraction
5.Mirrors and Lenses
6.Human Eye and Optical Instruments
7.Primary colors of light and human vision
8.Color addition of light
9.Color subtraction of light using filters

የምዕራፍ 6 አጭር ማስታወሻዎች

በ10ኛ ክፍል የፊዚክስ ገጽ ላይ በዚህ ምዕራፍ ሥር የተመዘገቡት ካርዶች። አንድ በአንድ ይክፈቱ።

የብርሃን ቀለሞች ድመራየማጣቀሻ ሠንጠረዥRed · Blue

ቀዳሚ ቀለም 1	ቀዳሚ ቀለም 2	የተገኘው ሁለተኛ ደረጃ ቀለም
Red	Green	Yellow
Red	Blue	Magenta
Blue	Green	Cyan

መቼ እንደሚጠቀሙበት

ቀዳሚ የብርሃን ቀለሞችን በማቀላቀል የሚገኘውን ሁለተኛ ደረጃ ቀለም ለመወሰን ይጠቀሙበት።

ይጠንቀቁ

የቀለም ድመራ የሚሠራው ለብርሃን ጨረሮች እንጂ የቀለም ቅቦችን ለማደባለቅ አይደለም።

ከGrade 10 Physics፣ ከገጽ 156 ጀምሮ የተዘጋጀ፤ ከመውጣቱ በፊት ሁለት ጊዜ ተረጋግጧል

የሌንስ ቀመርቀመር

\frac{1}{v} - \frac{1}{u} = \frac{1}{f}

\frac{1}{v} - \frac{1}{u} = \frac{1}{f}

$v$: የምስል ርቀት $\text{m}$
$u$: የቁስ ርቀት $\text{m}$
$f$: የፎካል ርዝመት $\text{m}$

መቼ እንደሚጠቀሙበት

በስስ ሉላዊ ሌንሶች ላይ የቁስ ርቀትን፣ የምስል ርቀትን ወይም የፎካል ርዝመትን ለማግኘት ይጠቀሙበት።

ይጠንቀቁ

የሌንስ ቀመር ከመስታወት ቀመር በተለየ ከ 1/u በፊት የመቀነስ ምልክት አለው።

ከGrade 10 Physics፣ ከገጽ 156 ጀምሮ የተዘጋጀ፤ ከመውጣቱ በፊት ሁለት ጊዜ ተረጋግጧል

የመስታወት ቀመርቀመር

\frac{1}{v} + \frac{1}{u} = \frac{1}{f}

\frac{1}{v} + \frac{1}{u} = \frac{1}{f}

$v$: የምስል ርቀት $\text{m}$
$u$: የቁስ ርቀት $\text{m}$
$f$: የፎካል ርዝመት $\text{m}$

መቼ እንደሚጠቀሙበት

በሉላዊ መስታወቶች ላይ የምስል ርቀትን፣ የቁስ ርቀትን ወይም የፎካል ርዝመትን ለማስላት ይጠቀሙበት።

ይጠንቀቁ

የፎካል ርዝመት ለኮንኬቭ መስታወት አዎንታዊ ሲሆን ለኮንቬክስ መስታወት ደግሞ አሉታዊ ነው።

ከGrade 10 Physics፣ ከገጽ 156 ጀምሮ የተዘጋጀ፤ ከመውጣቱ በፊት ሁለት ጊዜ ተረጋግጧል

የሌንስ ኃይልቀመር

P = \frac{1}{f}

P = \frac{1}{f}

$P$: የሌንስ ኃይል $\text{D}$
$f$: የፎካል ርዝመት $\text{m}$

መቼ እንደሚጠቀሙበት

የሌንስን ኃይል ከፎካል ርዝመት ለማስላት ወይም የእይታ ጉድለትን የሚያስተካክሉ ሌንሶችን ለመወሰን ይጠቀሙበት።

ይጠንቀቁ

ኃይሉን በዳዮፕተር ለማግኘት የፎካል ርዝመት የግድ ወደ ሜትር መቀየር አለበት።

ከGrade 10 Physics፣ ከገጽ 156 ጀምሮ የተዘጋጀ፤ ከመውጣቱ በፊት ሁለት ጊዜ ተረጋግጧል

የስኔል የስብረት ሕግቀመር

n_1 \sin\theta_1 = n_2 \sin\theta_2

n_1 \sin\theta_1 = n_2 \sin\theta_2

$n_1$: የመጀመሪያው መካከለኛ አንፃራዊ የመስበር ጠቋሚ $1$
$\theta_1$: የአደጋ አንግል $^\circ$
$n_2$: የሁለተኛው መካከለኛ አንፃራዊ የመስበር ጠቋሚ $1$
$\theta_2$: የስብረት አንግል $^\circ$

መቼ እንደሚጠቀሙበት

ብርሃን ከአንድ መካከለኛ ወደ ሌላ ሲሻገር ማዕዘናትን ወይም የመስበር ጠቋሚዎችን ለማስላት ይጠቀሙበት።

ይጠንቀቁ

ማዕዘናት መለካት ያለባቸው ከኖርማል መስመሩ አንጻር እንጂ ከድንበሩ ገጽ አንጻር አይደለም።

ከGrade 10 Physics፣ ከገጽ 156 ጀምሮ የተዘጋጀ፤ ከመውጣቱ በፊት ሁለት ጊዜ ተረጋግጧል

የምዕራፍ 6 የመልመጃ ጥያቄዎች

በዚህ ምዕራፍ ላይ የተጻፉ 10 የምርጫ ጥያቄዎች፣ እያንዳንዳቸው መልሱና ምክንያቱ አላቸው። መልሱን ከመክፈትዎ በፊት ይሞክሩ። ጥያቄዎቹ በእንግሊዝኛ ናቸው።

ጥያቄ 1

According to the textbook, which three colors are the primary colors of light?

A.Red, yellow, and blue
B.Yellow, cyan, and magenta
C.Red, green, and blue
D.Red, white, and green

መልሱንና ምክንያቱን ያሳዩ

መልስ፦ C Red, green, and blue

ምክንያቱ

Red, green, and blue are the three primary colors of light.

ጥያቄ 2

What is the speed of light in a vacuum, represented by c?

A.3.00 × 108 m/s
B.3.00 × 106 m/s
C.1.50 × 108 m/s
D.3.00 × 105 m/s

መልሱንና ምክንያቱን ያሳዩ

መልስ፦ A 3.00 × 108 m/s

ምክንያቱ

Light travels with a speed of 3.00 × 10⁸ m/s in a vacuum.

ጥያቄ 3

Which light-sensing photoreceptor cells in the human retina are sensitive to colors?

A.Rods
B.Cones
C.Ciliary muscles
D.Optic nerves

መልሱንና ምክንያቱን ያሳዩ

መልስ፦ B Cones

ምክንያቱ

Rods and cones are the two photoreceptors in the retina, and cones are specifically sensitive to colors.

ጥያቄ 4

Why is a convex mirror preferred as a rear-view mirror in vehicles?

A.It produces inverted images at infinity
B.It focuses light rays to a single focal point
C.It forms magnified real images of vehicles behind
D.It gives a wider field of view and forms erect, diminished images

መልሱንና ምክንያቱን ያሳዩ

መልስ፦ D It gives a wider field of view and forms erect, diminished images

ምክንያቱ

A convex mirror is used as a rear-view mirror because it gives a wider field of view and always forms a virtual, erect, and diminished image.

ጥያቄ 5

Which of the following correctly lists electromagnetic radiations in order of increasing frequency?

A.Gamma rays, X-rays, ultraviolet, visible light, infrared
B.Infrared, visible light, ultraviolet, X-rays, gamma rays
C.Visible light, infrared, ultraviolet, gamma rays, X-rays
D.Radio waves, X-rays, visible light, ultraviolet, infrared

መልሱንና ምክንያቱን ያሳዩ

መልስ፦ B Infrared, visible light, ultraviolet, X-rays, gamma rays

ምክንያቱ

In order of increasing frequency, the electromagnetic radiation sequence is infrared, visible light, ultraviolet, X-rays, and gamma rays.

ጥያቄ 6

In the addition of colored light, what color is produced when red light is mixed with green light?

A.Yellow
B.Magenta
C.Cyan
D.Blue

መልሱንና ምክንያቱን ያሳዩ

መልስ፦ A Yellow

ምክንያቱ

Combining red light and green light gives yellow light (Red + Green = Yellow).

ጥያቄ 7

In a school laboratory in Hawassa, a student places an object between two plane mirrors inclined at an angle of 30°. How many images are formed?

A.6
B.10
C.11
D.12

መልሱንና ምክንያቱን ያሳዩ

መልስ፦ C 11

ምክንያቱ

The formula for the number of images formed by two inclined mirrors is (360° / θ) - 1. Here, (360° / 30°) - 1 = 12 - 1 = 11.

ጥያቄ 8

What are the near point and far point of vision for a young adult with normal vision?

A.Near point is 10 cm, and far point is 100 m
B.Near point is about 25 cm, and far point is infinity
C.Near point is about 25 cm, and far point is 25 m
D.Near point is 0 cm, and far point is infinity

መልሱንና ምክንያቱን ያሳዩ

መልስ፦ B Near point is about 25 cm, and far point is infinity

ምክንያቱ

For a young adult with normal vision, the near point is about 25 cm, and the far point is at infinity.

ጥያቄ 9

Which two conditions must be satisfied for total internal reflection to occur?

A.Light must travel along the normal line through two media of equal density.
B.Light must travel from an optically rarer medium to a denser medium, and the incident angle must be greater than the critical angle.
C.Light must travel from an optically denser medium to a rarer medium, and the incident angle must be less than the critical angle.
D.Light must travel from an optically denser medium to a less dense medium, and the angle of incidence must be greater than the critical angle.

መልሱንና ምክንያቱን ያሳዩ

መልስ፦ D Light must travel from an optically denser medium to a less dense medium, and the angle of incidence must be greater than the critical angle.

ምክንያቱ

Total internal reflection requires light to travel from an optically denser medium (higher refractive index) to an optically less dense medium (lower refractive index) and the angle of incidence to exceed the critical angle.

ጥያቄ 10

An optometrist in Addis Ababa prescribes a lens with a power of -5.5 D to correct a person's distant vision defect. What is the focal length of this lens?