Light Spectrum

Q. Naked human eyes can only see:

1. Gamma rays
2. X-rays
3. Ultraviolet rays
4. Visible light rays

Q. Visible light has wavelengths between ________ and ________.

1. 500 nm and 900 nm
2. 10 nm and 100 nm
3. 100 nm and 200 nm
4. 
   400 nm and 800 nm

Q. Arrange the following radiation in the order of decreasing wavelength.

1. Microwaves
2. Gamma rays
3. Infrared
4. Visible light
5. Ultraviolet

Q. Electromagnetic radiation whose wavelength lies between 400 nm to 700 nm, is called visible light.

1. False
2. True

Q. Gamma rays have the longest wavelength.

1. True
2. False

Q. Electromagnetic waves cannot travel through vacuum.

1. False
2. True

Q. Which of the following radiation have the wavelength less than 0.3 mm?

1. Radio
2. Microwave
3. Visible light
4. Infrared

Q. Which among the following has the shortest wavelength?

1. Micro waves
2. Ultraviolet rays
3. X-rays
4. Gamma rays

Q.

Which among the following coloured light has the shortest wavelength?

1. Blue

2. Red

3. Green

4. Yellow

Q. Identify the types of electromagnetic radiation.

1. Visible light
2. Microwaves
3. Beta rays
4. Gamma rays
5. Sound waves
6. Infrared rays
7. X-rays
8. Alpha rays