1.
Which of the following produces absorption spectrum?
2.
Emission spectrum shows:
3.
Emission spectrum occurs when electrons:
4.
What happens to the number of photoelectrons when intensity is doubled at same frequency?
5.
Absorption spectrum is produced when light passes through:
6.
The graph of KE vs frequency in photoelectric effect is a straight line because:
7.
A cool gas in front of a hot source produces dark lines because:
8.
Emission spectrum appears due to:
9.
The photoelectric effect fails when:
10.
The threshold frequency depends on:
11.
The spectrum produced by a glowing tungsten filament is:
12.
Continuous spectrum from the sun is due to:
13.
Which radiation produces the largest number of spectral lines?
14.
A spectrograph containing prism splits light due to:
15.
Emission spectrum lines originate due to:
16.
Continuous spectrum lacks:
17.
Which property distinguishes absorption and emission spectral lines?
18.
Which colour has maximum wavelength in visible spectrum?
19.
Which region of EM spectrum shows maximum absorption lines in molecules?
20.
The slope of KE vs frequency graph in photoelectric effect gives:
21.
Continuous spectrum merges because:
22.
Which is true for absorption spectrum?
23.
In photoelectric effect, the graph of KE vs intensity is:
24.
Which type of spectrum is produced by sunlight passing through the Earth’s atmosphere?
25.
Which radiation is not seen in visible spectrum?
26.
An absorption spectrum is the inverse of:
28.
A cool gas in front of a hot source gives:
29.
Band spectrum is usually produced by:
30.
A hydrogen discharge tube produces:
31.
Dark lines in absorption spectrum occur because:
32.
Line spectra are due to:
33.
Dark lines in the solar spectrum are called:
34.
A hot glowing gas produces what type of spectrum?
35.
Absorption spectrum contains:
36.
Spectrum is defined as:
37.
Continuous spectrum is obtained when:
38.
Continuous spectrum of VIBGYOR is produced when:
39.
If the threshold wavelength is 500 nm, what happens when light of 600 nm falls on the metal?
40.
Emission spectrum is produced when atoms:
41.
Which instrument disperses light into its component wavelengths?
42.
Which spectrum is unique for each element?
43.
Line spectra are observed in which state?
44.
Spectroscope is used to:
45.
Which one forms a continuous spectrum?
