ELECTROMAGNETIC SPECTRUM

Name: Assignment - V Class: X Subject: Physics

ELECTROMAGNETIC SPECTRUM


I Choose the correct answer

1. Velocity of electromagnetic radiations is ( )
(a) 3 x1010ms-1 (b) 3 x 108ms-1 (c) 3 x 1010kms-1 (d) 3 x 108cms-1
2. The properties of different electromagnetic radiations are characterised by ( )
(a) Their Colour (b) Their Velocity (c) Their Frequency
(d) Their frequencies and wavelengths.
3. Which of the following has shortest wavelength ( )
(a) - Rays (b) Radio waves (c) Visible spectrum (d) Microwaves
4. Which of the following has shortest wavelength ( )
(a) Visible spectrum (b)  - rays (c) Radio waves (d) x – rays
5. Electromagnetic waves transport ( )
(a) Charge (b) Frequency (c) Wave length (d) Energy

II Fill in the Blanks

1. A _______________ is a group of wavelengths or frequencies.
2. ______________ glass absorbs infrared radiation.
3. Infra red radiations are nothing but a form of _____________
4. ______________ radiations are used to take photographs of objects in darkness.
5. ______________ rays are emitted in radioactivity

III 1 Mark questions

1. What is a spectrum?
A. A group of wavelengths or frequencies is called a spectrum.
2. What are electro magnetic radiations?
A. Electromagnetic radiations are characterised by oscillating electric and magnetic fields.
3. What are the various types of electromagnetic radiations?
A. The various types of electromagnetic radiations are
i) Visible spectrum ii) Infrared spectrum iii) Microwaves iv) Radio waves
v) Ultra Violet spectrum vi) x-rays and vii) - rays





IV 2 Marks questions

1. What are the common features among all the electromagnetic radiations?
2. Draw the diagram of electromagnetic wave

V 4 Marks questions

1. Discuss different types of electromagnetic radiations briefly?