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7.1 Quantum Theory of Light F5 Bm/Bi VI

Total questions: 10

Worksheet time: 5mins

Name
Class
Date
1.

A _______ is an idealised body that is able to absorb all electromagnetic radiation that falls on it.

_______ merupakan suatu jasad unggul yang berupaya menyerap semua sinaran elektromagnet yang jatuh padanya.

a)

Black body

Jasad hitam

b)

White body

Jasad putih

c)

Planck’s body

Jasad Planck

d)

Radiator body

Jasad pemancar

2.

A black body can emit thermal radiation depending on its _______.

Jasad hitam juga dapat memancarkan sinaran termal bergantung pada _______.

a)

Pressure

Tekanan

b)

Volume

Isipadu

c)

Temperature

Suhu

d)

Light intensity

Keamatan cahaya

3.

_______ is a discrete energy packet and not a continuous energy.

_______ ialah paket tenaga yang diskrit dan bukan tenaga selanjar.

a)

Quantum theory

Teori Quantum

b)

Quantum of energy

Kuantum tenaga

c)

Photon

Foton

d)

Wave-Particle Duality

Kedualan Gelombang-Zarah

4.

The wavelengths, λ of the violet light and the yellow-orange light are 404.7 nm and 578.2 nm respectively. What is the energy quantum, E for the violet light and the yellow-orange light?

Panjang gelombang, λ bagi warna ungu ialah 404.7 nm dan warna kuning jingga ialah 578.2 nm.

Berapakah kuantum tenaga, E masing-masing bagi warna ungu dan kuning jingga?

a)

Ungu: 6.99 eV

Kuning-jingga: 4.89 eV

b)

Ungu: 4.89 eV

Kuning-jingga: 6.99 eV

c)

Ungu: 3.07 eV

Kuning-jingga: 2.15 eV

d)

Ungu: 2.15 eV

Kuning-jingga: 3.07 eV

5.

A particle is said to have wave-particle duality when that particle exhibits the properties of both _______ and _______

Suatu zarah dikatakan bersifat kedualan gelombang-zarah apabila zarah tersebut menunjukkan kedua-dua sifat _______ dan _______

a)

Wave, Atom

Gelombang, Atom

b)

Wave, Light

Gelombang, Cahaya

c)

Electron, Particle

Elektron, Zarah

d)

Wave, Particle

Gelombang, Zarah

6.

What is the relationship between the momentum of a particle and wavelength?

Apakah hubungan diantara momentum zarah dan panjang gelombang?

a)

Linearly increase

Meningkat secara linear

b)

Constant

Malar

c)

Directly proportional

Berkadar terus

d)

Inversely proportional

Berkadar songsang

7.

A 60 W lamp emits red light with a wavelength, l = 7.0 × 10–7 m. What is the number of photons emitted per second?

Sebuah lampu 60 W memancarkan cahaya merah dengan panjang gelombang, l = 7.0 × 10–7 m. Berapakah bilangan foton yang dipancarkan per saat?

a)

1.90 x 1037s-1

b)

4.74 x 10-21s-1

c)

1.90 x 10-37s-1

d)

4.74 x 1021s-1

8.

"object emitting electromagnetic radiation which is determined by its temperature"

"objek yang memancarkan sinaran elektromagnet mengikut suhunya"


This is definition for

Ini adalah definisi bagi

a)

black body

Jasad hitam

b)

black body radiator

Pemancar jasad hitam

c)

thermal radiation

sinaran termal

d)

quantum wave

gelombang kuantum

9.

What classical theory stated regrading this curve?

Apakah yang dinyatakan oleh teori klasik berkaitan lengkungan ini?

a)

the higher the light's intensity, the higher the energy of the light.

Semakin tinggi keamatan cahaya, semakin tinggi tenaga cahaya itu

b)

the higher the light's intensity, the lower the energy of the light.

Semakin tinggi keamatan cahaya, semakin rendah tenaga cahaya itu

c)

the lower the light's intensity, the higher the energy of the light.

Semakin rendah keamatan cahaya, semakin tinggi tenaga cahaya

10.

Which part of this graph against classical theory?

Bahahian graf yang manakah yang bertentangan dengan teori klasik?

a)

left side of the graph

bahagian kiri graf

b)

right side of the graph

bahagian kanan graf

c)

at the peak of the graph

pada puncak graf