# When electromagnetic radiation of wavelength 300 nm?

Last Update: May 27, 2022

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When electromagnetic radiation of wavelength 300 nm falls on the surface of sodium, electrons are emitted with a kinetic energy of $1.68\times 10\text{ }Jmo{{l}^{-1}}$.

## What is the maximum wavelength that cause a photoelectron to be emitted?

The wavelength corresponding to 4.2 eVis 295.3 nm, which is the longest wavelength that can cause photoelectrons to be ejected. If 200 nm light falls on it its energy is 6.2 eV. Thus the maximum kinetic energy of emitted photoelectrons is (6.2-4.2)= 2 eV. The minimum kinetic energy is zero.

## What happens when the wavelength of electromagnetic radiation decreases?

The number of complete wavelengths in a given unit of time is called frequency (f). As a wavelength increases in size, its frequency and energy (E) decrease. From these equations you may realize that as the frequency increases, the wavelength gets shorter. As the frequency decreases, the wavelength gets longer.

## What is the maximum wavelength of electromagnetic radiation?

- Electromagnetic radiation with maximum wavelength is the radio wave. - The frequency ranges between 300 gigahertz (GHz) to 30 hertz (Hz).

## What are the 7 types of radiation?

This range is known as the electromagnetic spectrum. The EM spectrum is generally divided into seven regions, in order of decreasing wavelength and increasing energy and frequency. The common designations are: radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV), X-rays and gamma rays.

## When electromagnetic radiaiton of wavelength 300 nm falls on the surface of sodium electrons a...

42 related questions found

### What are the 4 types of radiation?

There are four major types of radiation: alpha, beta, neutrons, and electromagnetic waves such as gamma rays. They differ in mass, energy and how deeply they penetrate people and objects. The first is an alpha particle.

### What happens as wavelength decreases?

So if a wave slows down, its wavelength will decrease. ... Although the wave slows down, its frequency remains the same, due to the fact that its wavelength is shorter. When waves travel from one medium to another the frequency never changes. As waves travel into the denser medium, they slow down and wavelength decreases.

### What property is the same for all electromagnetic waves?

All electromagnetic waves travel at the same speed through empty space. That speed, called the speed of light, is about 300 million meters per second (3.0 x 108 m/s).

### What color is the lowest frequency?

The lowest frequency of visible light, which is red, has the least energy.

### What are the 7 electromagnetic waves in order?

The electromagnetic spectrum includes, from longest wavelength to shortest: radio waves, microwaves, infrared, optical, ultraviolet, X-rays, and gamma-rays.

### What is the highest frequency?

Gamma rays have the shortest wavelengths and highest frequencies of all electromagnetic waves. Gamma rays have more energy than any other electromagnetic waves, because of their extremely high frequencies.

### What is the maximum wavelength of electromagnetic radiation that can eject photoelectrons from the metal?

What is the maximum kinetic energy of the ejected photoelectrons? Violet light of wavelength 400 nm ejects electrons with a maximum kinetic energy of 0.860 eV from sodium metal.

### When electromagnetic radiation of wavelength 300 nm falls on the surface of sodium electrons are emitted with a kinetic energy of?

When electromagnetic radiation of wavelength 300 nm falls on the surface of sodium, electrons are emitted with a kinetic energy of 1.68×10 Jmol−1. .

### What is the minimum energy needed to remove an electron from sodium?

The minimum energy to remove a mole of electrons from sodium is 2.31×105Jmol−1. The minimum energy for one mole of electrons is 3.84×10−19J. On rearranging the above equation, we get an expression to calculate wavelength.

### What are the 4 main properties of electromagnetic waves?

Every form of electromagnetic radiation, including visible light, oscillates in a periodic fashion with peaks and valleys, and displaying a characteristic amplitude, wavelength, and frequency that defines the direction, energy, and intensity of the radiation.

### What are examples of devices that use electromagnetic waves?

Electromagnetic waves are ubiquitous in nature (i.e., light) and used in modern technology—AM and FM radio, cordless and cellular phones, garage door openers, wireless networks, radar, microwave ovens, etc. These and many more such devices use electromagnetic waves to transmit data and signals.

### Which two waves lie at the ends?

Radio waves and microwaves lie at the longer end of the spectrum of electromagnetic energy (kilometers and meters to centimeters and milimeters), while x rays and gamma rays have very short wavelengths (billionths or trillionths of a meter).

### What happens to speed when wavelength increases?

A: Increasing the wavelength of a wave doesn't change its speed. That's because when wavelength increases, wave frequency decreases. As a result, the product of wavelength and wave frequency is still the same speed.

### Which color of light has the shortest wavelength?

Blue or violet light has the shortest wavelength. White light is a combination of all colors in the color spectrum.

### What is the relation between frequency and wavelength?

Frequency and wavelength are inversely proportional to each other. The wave with the greatest frequency has the shortest wavelength. Twice the frequency means one-half the wavelength. For this reason, the wavelength ratio is the inverse of the frequency ratio.

### What is the weakest type of radiation?

Alpha rays are the weakest and can be blocked by human skin and gamma rays are the strongest and only dense elements like lead can block them.

### What are the three major types of radiation?

The three most common types of radiation are alpha particles, beta particles, and gamma rays.

### What types of radiation are harmful?

Alpha particles are the most harmful internal hazard as compared with gamma rays and beta particles. Radioactive materials that emit alpha and beta particles are most harmful when swallowed, inhaled, absorbed, or injected. Gamma rays are the most harmful external hazard.