1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ankoles [38]
3 years ago
12

Humans experience the longest visible electromagnetic waves as

Physics
1 answer:
Margarita [4]3 years ago
8 0

Answer:

Red light

Explanation:

The electromagnetic spectrum classifies all the electromagnetic waves according to their wavelength/frequency. In order from shortest to longest wavelength, we have

Gamma rays

X rays

Ultraviolet

Visible light

Infrared

Microwaves

Radio waves

All of these waves are invisible to human eye, except for the "visible light" part of the spectrum. Waves in the visible light part are perceived by human as different colors, depending on their wavelength. More specifically, they appear as follows:

Violet (380-450 nm)

Blue (450-495 nm)

Green (495-570 nm)

Yellow (570-590 nm)

Orange (590-620 nm)

Red (620-750 nm)

So we see that the longest electromagnetic wave in the visible light part of the spectrum corresponds to red light.

You might be interested in
Luis and Aisha conducted an experiment. They exerted different forces on four objects. Their results are shown in the table.
lesya692 [45]

Answer:

Object 3 has greatest acceleration.

Explanation:

Objects               Mass                                Force

1                            10 kg                               4 N              

2                           100 grams                       20 N

3                            10 grams                         4 N

4                             1 kg                                 20 N

Acceleration of object 1,

a_1=\dfrac{F_1}{m_1}\\\\a_1=\dfrac{4}{10}\\\\a_1=0.4\ m/s^2

Acceleration of object 2,

a_2=\dfrac{F_2}{m_2}\\\\a_2=\dfrac{20}{0.1}\\\\a_2=200\ m/s^2

Acceleration of object 3,

a_3=\dfrac{F_3}{m_3}\\\\a_3=\dfrac{4}{0.01}\\\\a_3=400\ m/s^2

Acceleration of object 4,

a_4=\dfrac{F_4}{m_4}\\\\a_4=\dfrac{20}{1}\\\\a_3=20\ m/s^2

It is clear that the acceleration of object 3 is 400\ m/s^2 and it is greatest of all. So, the correct option is (3).

4 0
3 years ago
Read 2 more answers
The critical angle for a liquid in air is 520, What is the liquid's index of refraction? 0.62 0.79 1.27 1.50
sammy [17]

Answer:

Liquid's index of refraction, n₁ = 1.27

Explanation:

It is given that,

The critical angle for a liquid in air is, \theta_c=52^o

We have to find the refractive index of the liquid. Critical angle of a liquid is defined as the angle of incidence in denser medium for which the angle of refraction is 90°.

Using Snell's law as :

n_1sin\theta_c=n_2sin\theta_2

Here, \theta_2=90

sin\theta_c=\dfrac{n_2}{n_1}

Where

n₂ = Refractive index of air = 1

n₁ = refractive index of liquid

So,

n_1=\dfrac{n_2}{sin\theta_c}

n_1=\dfrac{1}{sin(52)}

n₁ = 1.269

or n₁ = 1.27

Hence, the refractive index of liquid is 1.27

8 0
3 years ago
Hiện tượng lọc và siêu lọc
STALIN [3.7K]

Answer:

Siêu lọc (UF) là một dạng lọc màng trong đó các lực như áp suất hoặc gradient nồng độ được phân tách thông qua một màng bán thấm. Chất rắn lơ lửng và chất tan có trọng lượng phân tử cao được giữ lại trong cái gọi là retentate, trong khi nước và chất tan có trọng lượng phân tử thấp đi qua màng trong quá trình thẩm thấu (lọc). Quá trình tách này được sử dụng trong công nghiệp và nghiên cứu để tinh chế và cô đặc các dung dịch cao phân tử (103 106 Da), đặc biệt là các dung dịch protein.

Siêu lọc về cơ bản không khác gì vi lọc. Hai điều này khác nhau trên cơ sở loại trừ kích thước hoặc bắt giữ hạt. Điều này về cơ bản khác với sự phân tách khí qua màng, dựa trên tốc độ hấp thụ và khuếch tán khác nhau với số lượng khác nhau. Màng siêu lọc được xác định bằng trọng lượng phân tử (MWCO) của màng được sử dụng. Siêu lọc được thực hiện ở chế độ dòng chảy chéo hoặc dòng chết.

7 0
2 years ago
Which force always pulls downward on objects?
oksano4ka [1.4K]
Gravity. Hope this helps!
6 0
3 years ago
Read 2 more answers
The electrons between atoms in metallic bonds
Scilla [17]

Answer:

In metallic bonds, the valence electrons from the s and p orbitals of the interacting metal atoms delocalize.

7 0
3 years ago
Read 2 more answers
Other questions:
  • Find the wavelength in meters for a transverse mechanical wave with an amplitude of 10 cm and a radian frequency of 20π rad/s if
    12·1 answer
  • What is the kinetic energy of a 120-cm thin uniform rod with a mass of 450 g that is rotating about its center at 3.60 rad/s?
    9·1 answer
  • What's the difference between electromagnetic waves and electromagnetic spectrum?
    8·1 answer
  • PLEASE PLEASE HELP ME!!!!!!!!!!
    15·1 answer
  • Which of the following is MOST needed for cosmologists to study the age of the universe? A. Energy levels B. Static C. Size D. D
    5·2 answers
  • In 40 words or fewer, summarize the connection between kinetic and thermal energy.<br> PLEASE REPLY
    14·1 answer
  • 6. An aircraft is is travelling along a runway at a Velocity of 25m/s in It accelerates at a rate of 4m/s² for a distance of 750
    12·1 answer
  • The net external force on the propeller of a 0.75 kg model airplane is 17N forward. What is the
    11·1 answer
  • Is it true or false that it is never sensible to calculate more than 100% of a number​
    8·1 answer
  • 2. A 50 kg diver is standing on the edge of a 15 m high cliff. What is his potential energy?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!