MEDIUM
10th ICSE
IMPORTANT
Earn 100

A glass slab is placed over a page on which word VIBGYOR is printed (in corresponding colours). Will the image of letters be in the same place? If not, state which will be raised to maximum and why?

Important Questions on Electromagnetic Spectrum and Dispersion of Light

EASY
10th ICSE
IMPORTANT
Self Study in Physics>Chapter 6 - Electromagnetic Spectrum and Dispersion of Light>TEST YOURSELF>Q 2

Why is white light considered to be polychromatic in nature ?

MEDIUM
10th ICSE
IMPORTANT
Self Study in Physics>Chapter 6 - Electromagnetic Spectrum and Dispersion of Light>TEST YOURSELF>Q 2
Give the range of the wavelength of those electromagnetic waves which are visible to us.
MEDIUM
10th ICSE
IMPORTANT
Self Study in Physics>Chapter 6 - Electromagnetic Spectrum and Dispersion of Light>TEST YOURSELF>Q 3
A prism causes dispersion of white light while a rectangular glass block does not. Explain.
MEDIUM
10th ICSE
IMPORTANT
Self Study in Physics>Chapter 6 - Electromagnetic Spectrum and Dispersion of Light>TEST YOURSELF>Q 4
Why sky appears blue to us and sunlight yellow?
MEDIUM
10th ICSE
IMPORTANT
Self Study in Physics>Chapter 6 - Electromagnetic Spectrum and Dispersion of Light>TEST YOURSELF>Q 5
The wavelength of red colour is 7 × 10-7 m and that of blue is 4×10-7 m. Will the speed of both colours be same in (i) vacuum (ii) glass ?
MEDIUM
10th ICSE
IMPORTANT
Self Study in Physics>Chapter 6 - Electromagnetic Spectrum and Dispersion of Light>TEST YOURSELF>Q 6

Explain why: Infrared radiations are used for photography in fog.

EASY
10th ICSE
IMPORTANT
Self Study in Physics>Chapter 6 - Electromagnetic Spectrum and Dispersion of Light>TEST YOURSELF>Q 6

Explain why: The photographic darkrooms are provided with infrared lamps.

EASY
10th ICSE
IMPORTANT
Self Study in Physics>Chapter 6 - Electromagnetic Spectrum and Dispersion of Light>TEST YOURSELF>Q 6

Explain why: Ultraviolet bulbs have a quartz envelope instead of glass.